Добавьте файлы проекта.

YandexMusic.API/Models/Playlist/YArtistPlaylistType.cs

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+using System.Runtime.Serialization;
+
+namespace YandexMusic.API.Models.Playlist
+{
+    public enum YArtistPlaylistType
+    {
+        [EnumMember(Value = "TOP")]
+        Top,
+        [EnumMember(Value = "SIMILAR")]
+        Similar
+    }
+}

YandexMusic.API/Models/Playlist/YGeneratedPlaylistType.cs

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+namespace YandexMusic.API.Models.Playlist
+{
+    public enum YGeneratedPlaylistType
+    {
+        None,
+
+        /// <summary>
+        /// Редакторский список
+        /// </summary>
+        Editorial,
+
+        /// <summary>
+        /// Плейлист дня
+        /// </summary>
+        PlaylistOfTheDay,
+
+        /// <summary>
+        /// Премьера
+        /// </summary>
+        RecentTracks,
+
+        /// <summary>
+        /// Дежавю
+        /// </summary>
+        NeverHeard,
+
+        /// <summary>
+        /// Тайник
+        /// </summary>
+        MissedLikes,
+
+        /// <summary>
+        /// Алиса
+        /// </summary>
+        Origin,
+
+        /// <summary>
+        /// Кинопоиск
+        /// </summary>
+        Kinopoisk
+    }
+}

YandexMusic.API/Models/Playlist/YPlaylist.cs

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+using YandexMusic.API.Models.Common;
+using YandexMusic.API.Models.Common.Cover;
+using YandexMusic.API.Models.Track;
+
+namespace YandexMusic.API.Models.Playlist
+{
+    public class YPlaylist : YBaseModel
+    {
+        #region Поля
+
+        public YPlaylistUidPair GetKey()
+        {
+            return new YPlaylistUidPair
+            {
+                Uid = Owner.Uid,
+                Kind = Kind
+            };
+        }
+
+        #endregion Поля
+
+        #region Свойства
+
+        public YButton ActionButton { get; set; }
+        public string AnimatedCoverUri { get; set; }
+        public bool Available { get; set; }
+        public YArtistPlaylistType ArtistPlaylistType { get; set; }
+        public string BackgroundColor { get; set; }
+        public string BackgroundImageUrl { get; set; }
+        public string BackgroundVideoUrl { get; set; }
+        public bool Collective { get; set; }
+        [JsonConverter(typeof(YCoverConverter))]
+        public YCover Cover { get; set; }
+        [JsonConverter(typeof(YCoverConverter))]
+        public YCover CoverWithoutText { get; set; }
+        public YCustomWave CustomWave { get; set; }
+        public List<YId> RecentTracks { get; set; }
+        public DateTime Created { get; set; }
+        public YDerivedColors DerivedColors { get; set; }
+        public string Description { get; set; }
+        public string DescriptionFormatted { get; set; }
+        public bool DoNotIndex { get; set; }
+        public long DurationMs { get; set; }
+        public bool EverPlayed { get; set; }
+        public string GeneratedPlaylistType { get; set; }
+        public bool HasTrailer { get; set; }
+        public string IdForFrom { get; set; }
+        public string Image { get; set; }
+        public bool IsBanner { get; set; }
+        public bool IsPremiere { get; set; }
+        public string Kind { get; set; }
+        public List<YPlaylist> LastOwnerPlaylists { get; set; }
+        public int LikesCount { get; set; }
+        public YPlaylistMadeFor MadeFor { get; set; }
+        public string MetrikaId { get; set; }
+        public string Modified { get; set; }
+        public string OgImage { get; set; }
+        public string OgTitle { get; set; }
+        public string OgDescription { get; set; }
+        public YOwner Owner { get; set; }
+        public YPager Pager { get; set; }
+        public decimal PersonalColor { get; set; }
+        public YPlaylistPlayCounter PlayCounter { get; set; }
+        public string PlaylistUuid { get; set; }
+        public List<YPrerolls> Prerolls { get; set; }
+        public int Revision { get; set; }
+        public List<YPlaylist> SimilarPlaylists { get; set; }
+        public int Snapshot { get; set; }
+        public List<YTag> Tags { get; set; }
+        public string TextColor { get; set; }
+        public string Title { get; set; }
+        public int TrackCount { get; set; }
+        public List<string> TrackIds { get; set; }
+        public List<YTrackContainer> Tracks { get; set; }
+        public YTrailer Trailer { get; set; }
+        public string Uid { get; set; }
+        public string UrlPart { get; set; }
+        public string Visibility { get; set; }
+
+        #endregion Свойства
+    }
+}

YandexMusic.API/Models/Playlist/YPlaylistChange.cs

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+using YandexMusic.API.Models.Track;
+
+namespace YandexMusic.API.Models.Playlist
+{
+    public class YPlaylistChange
+    {
+        public int? At { get; set; }
+        public int? From { get; set; }
+        [JsonProperty("op")]
+        public YPlaylistChangeType Operation { get; set; }
+        public int? To { get; set; }
+        public IEnumerable<YTrackAlbumPair> Tracks { get; set; }
+    }
+}

YandexMusic.API/Models/Playlist/YPlaylistChangeType.cs

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+namespace YandexMusic.API.Models.Playlist
+{
+    public enum YPlaylistChangeType
+    {
+        Insert,
+        Delete
+    }
+}

YandexMusic.API/Models/Playlist/YPlaylistMadeFor.cs

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+using YandexMusic.API.Models.Common;
+
+namespace YandexMusic.API.Models.Playlist
+{
+    public class YPlaylistMadeFor
+    {
+        public class YMadeForCaseForms
+        {
+            #region Свойства
+
+            public string Accusative { get; set; }
+            public string Dative { get; set; }
+            public string Genitive { get; set; }
+            public string Instrumental { get; set; }
+            public string Nominative { get; set; }
+            public string Prepositional { get; set; }
+
+            #endregion Свойства
+        }
+
+        #region Свойства
+
+        public YMadeForCaseForms CaseForms { get; set; }
+        public YOwner UserInfo { get; set; }
+
+        #endregion Свойства
+    }
+}

YandexMusic.API/Models/Playlist/YPlaylistPlayCounter.cs

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+namespace YandexMusic.API.Models.Playlist
+{
+    public class YPlaylistPlayCounter
+    {
+        public string Description { get; set; }
+        public string DescriptionNext { get; set; }
+        public bool Updated { get; set; }
+        public int? Value { get; set; }
+    }
+}

YandexMusic.API/Models/Playlist/YPlaylistUidPair.cs

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+namespace YandexMusic.API.Models.Playlist
+{
+    public class YPlaylistUidPair
+    {
+        public string Kind { get; set; }
+        public string Uid { get; set; }
+
+        public override string ToString()
+        {
+            return $"{Uid}:{Kind}";
+        }
+    }
+}