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YandexMusic.API/Models/Track/YTrack.cs

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+using YandexMusic.API.Models.Album;
+using YandexMusic.API.Models.Artist;
+using YandexMusic.API.Models.Common;
+
+namespace YandexMusic.API.Models.Track
+{
+    public class YTrack : YBaseModel, IEquatable<YTrack>
+    {
+        public List<YAlbum> Albums { get; set; }
+        public List<YArtist> Artists { get; set; }
+        public bool Available { get; set; }
+        public bool AvailableForPremiumUsers { get; set; }
+        public bool AvailableFullWithoutPermission { get; set; }
+        public List<string> AvailableForOptions { get; set; }
+        public string BackgroundVideoUri { get; set; }
+        public bool Best { get; set; }
+        public YChart Chart { get; set; }
+        public string ContentWarning { get; set; }
+        public string CoverUri { get; set; }
+        public List<string> ClipIds { get; set; }
+        public YDerivedColors DerivedColors { get; set; }
+        public List<string> Disclaimers { get; set; }
+        public long DurationMs { get; set; }
+        public string Error { get; set; }
+        public YTrackFade Fade { get; set; }
+        public long FileSize { get; set; }
+        public string Id { get; set; }
+        public bool IsSuitableForChildren { get; set; }
+        public YMajor Major { get; set; }
+        public YTrackNormalization Normalization { get; set; }
+        public YTrackNormalizationR128 R128 { get; set; }
+        public string OgImage { get; set; }
+        public bool LyricsAvailable { get; set; }
+        public YLyricsInfo LyricsInfo { get; set; }
+        public string PlayerId { get; set; }
+        public long PreviewDurationMs { get; set; }
+        public YPodcastEpisodeType PodcastEpisodeType { get; set; }
+        public DateTime PubDate { get; set; }
+        public string RealId { get; set; }
+        public bool RememberPosition { get; set; }
+        public string ShortDescription { get; set; }
+        public List<string> SpecialAudioResources { get; set; }
+        public string StorageDir { get; set; }
+        public YTrack Substituted { get; set; }
+        public string Title { get; set; }
+        public YTrackSharingFlag TrackSharingFlag { get; set; }
+        public YTrackSource TrackSource { get; set; }
+        public string Type { get; set; }
+        public string Version { get; set; }
+
+        public YTrackAlbumPair GetKey()
+        {
+            return new YTrackAlbumPair
+            {
+                Id = Id,
+                AlbumId = Albums?.FirstOrDefault()?.Id
+            };
+        }
+
+        #region IEquatable
+
+        public bool Equals(YTrack other)
+        {
+            if (ReferenceEquals(null, other)) return false;
+            if (ReferenceEquals(this, other)) return true;
+            return GetKey().Equals(other.GetKey());
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != GetType()) return false;
+            return Equals((YTrack)obj);
+        }
+
+        public override int GetHashCode()
+        {
+            return GetKey().GetHashCode();
+        }
+
+        #endregion IEquatable
+    }
+}

YandexMusic.API/Models/Track/YTrackAlbumPair.cs

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+namespace YandexMusic.API.Models.Track
+{
+    public class YTrackAlbumPair : IEquatable<YTrackAlbumPair>
+    {
+        public string AlbumId { get; set; }
+        public string Id { get; set; }
+
+        public override string ToString()
+        {
+            return string.Join(":", new[] { Id, AlbumId }.Where(s => !string.IsNullOrEmpty(s)));
+        }
+
+        #region IEquatable
+
+        public bool Equals(YTrackAlbumPair other)
+        {
+            if (ReferenceEquals(null, other)) return false;
+            if (ReferenceEquals(this, other)) return true;
+            return string.Equals(Id, other.Id) && string.Equals(AlbumId, other.AlbumId);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != GetType()) return false;
+            return Equals((YTrackAlbumPair)obj);
+        }
+
+        public override int GetHashCode()
+        {
+            unchecked
+            {
+                return ((Id != null ? Id.GetHashCode() : 0) * 397) ^ (AlbumId != null ? AlbumId.GetHashCode() : 0);
+            }
+        }
+
+        #endregion IEquatable
+    }
+}

YandexMusic.API/Models/Track/YTrackContainer.cs

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+namespace YandexMusic.API.Models.Track
+{
+    public class YTrackContainer : IEquatable<YTrackContainer>
+    {
+        public string Id { get; set; }
+        public string AlbumId { get; set; }
+        public decimal OriginalIndex { get; set; }
+        public decimal OriginalShuffleIndex { get; set; }
+
+        public bool Recent { get; set; }
+        public DateTime Timestamp { get; set; }
+        public YTrack Track { get; set; }
+
+        #region IEquatable
+
+        public bool Equals(YTrackContainer other)
+        {
+            if (ReferenceEquals(null, other)) return false;
+            if (ReferenceEquals(this, other)) return true;
+            return Track.GetKey() == other.Track.GetKey();
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != GetType()) return false;
+            return Equals((YTrackContainer)obj);
+        }
+
+        public override int GetHashCode()
+        {
+            return Track != null ? Track.GetHashCode() : 0;
+        }
+
+        #endregion IEquatable
+    }
+}

YandexMusic.API/Models/Track/YTrackFade.cs

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+namespace YandexMusic.API.Models.Track
+{
+    public class YTrackFade
+    {
+        public decimal InStart { get; set; }
+        public decimal InStop { get; set; }
+        public decimal OutStart { get; set; }
+        public decimal OutStop { get; set; }
+    }
+}

YandexMusic.API/Models/Track/YTrackNormalization.cs

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+namespace YandexMusic.API.Models.Track
+{
+    public class YTrackNormalization
+    {
+        public double Gain { get; set; }
+        public double Peak { get; set; }
+    }
+}

YandexMusic.API/Models/Track/YTrackNormalizationR128.cs

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+namespace YandexMusic.API.Models.Track
+{
+    public class YTrackNormalizationR128
+    {
+        public double I { get; set; }
+        public double Tp { get; set; }
+    }
+}

YandexMusic.API/Models/Track/YTrackPosition.cs

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+namespace YandexMusic.API.Models.Track
+{
+    public class YTrackPosition
+    {
+        public int? Index { get; set; }
+        public int? Volume { get; set; }
+    }
+}

YandexMusic.API/Models/Track/YTrackSimilar.cs

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+namespace YandexMusic.API.Models.Track
+{
+    public class YTrackSimilar
+    {
+        public YTrack Track { get; set; }
+        public List<YTrack> SimilarTracks { get; set; }
+    }
+}

YandexMusic.API/Models/Track/YTrackSupplement.cs

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+using YandexMusic.API.Models.Common;
+
+namespace YandexMusic.API.Models.Track
+{
+    public class YTrackSupplement
+    {
+        public string Id { get; set; }
+        public List<YClip> Clips { get; set; }
+        public YLyrics Lyrics { get; set; }
+        public List<YVideo> Videos { get; set; }
+    }
+}