Добавьте файлы проекта.

YandexMusic.API/Models/Ynison/Wave/YYnisonEntityOptions.cs

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+namespace YandexMusic.API.Models.Ynison.Wave
+{
+    public class YYnisonEntityOptions
+    {
+        public List<YYnisonTrackSource> TrackSources { get; set; }
+        public YYnisonWaveEntityOptional WaveEntityOptional { get; set; }
+    }
+}

YandexMusic.API/Models/Ynison/Wave/YYnisonPhonotekaSource.cs

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+namespace YandexMusic.API.Models.Ynison.Wave
+{
+    public class YYnisonPhonotekaSource
+    {
+        public YYnisonEntityContext EntityContext { get; set; }
+        public YYnisonId AlbumId { get; set; }
+        public YYnisonId PlaylistId { get; set; }
+    }
+}

YandexMusic.API/Models/Ynison/Wave/YYnisonTrackSource.cs

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+namespace YandexMusic.API.Models.Ynison.Wave
+{
+    public class YYnisonTrackSource
+    {
+        public decimal Key { get; set; }
+        public YYnisonWaveSource WaveSource { get; set; }
+        public YYnisonPhonotekaSource PhonotekaSource { get; set; }
+    }
+}

YandexMusic.API/Models/Ynison/Wave/YYnisonWaveEntityOptional.cs

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+namespace YandexMusic.API.Models.Ynison.Wave
+{
+    public class YYnisonWaveEntityOptional
+    {
+        public string SessionId { get; set; }
+    }
+}

YandexMusic.API/Models/Ynison/Wave/YYnisonWaveQueue.cs

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+namespace YandexMusic.API.Models.Ynison.Wave
+{
+    public class YYnisonWaveQueue
+    {
+        public List<YYnisonPlayableItem> RecommendedPlayableList { get; set; }
+        public int LivePlayableIndex { get; set; }
+        public YYnisonEntityOptions EntityOptions { get; set; }
+    }
+}

YandexMusic.API/Models/Ynison/Wave/YYnisonWaveSource.cs

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+namespace YandexMusic.API.Models.Ynison.Wave
+{
+    public class YYnisonWaveSource
+    {
+        public YYnisonWaveSourceType SourceType { get; set; }
+    }
+}

YandexMusic.API/Models/Ynison/Wave/YYnisonWaveSourceType.cs

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+using System.Runtime.Serialization;
+
+namespace YandexMusic.API.Models.Ynison.Wave
+{
+    public enum YYnisonWaveSourceType
+    {
+        [EnumMember(Value = "ONLINE_BY_DEFAULT")]
+        OnlineByDefault
+    }
+}