Добавьте файлы проекта.

YandexMusic.API/Models/Landing/Entity/Entities/Context/YPlayContext.cs

@@ -0,0 +1,58 @@
+namespace YandexMusic.API.Models.Landing.Entity.Entities.Context
+{
+    public sealed class YPlayContextConverter : JsonConverter
+    {
+        public override bool CanConvert(Type objectType)
+        {
+            return typeof(YLandingEntity).IsAssignableFrom(objectType);
+        }
+
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            if (reader.TokenType == JsonToken.Null)
+                return null;
+
+            JObject jObject = JObject.Load(reader);
+
+            YPlayContext context;
+            try
+            {
+                YPlayContextType type = jObject["context"].ToObject<YPlayContextType>();
+
+                switch (type)
+                {
+                    case YPlayContextType.Album:
+                        context = jObject.ToObject<YPlayContextAlbum>();
+                        break;
+                    case YPlayContextType.Artist:
+                        context = jObject.ToObject<YPlayContextArtist>();
+                        break;
+                    case YPlayContextType.Playlist:
+                        context = jObject.ToObject<YPlayContextPlaylist>();
+                        break;
+                    default:
+                        context = jObject.ToObject<YPlayContext>();
+                        break;
+                }
+            }
+            catch (Exception ex)
+            {
+                throw new Exception($"Ошибка десериализации типа \"{jObject["type"]}\".", ex);
+            }
+
+            return context;
+        }
+
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            throw new NotImplementedException();
+        }
+    }
+
+    public class YPlayContext
+    {
+        public string Client { get; set; }
+        public YPlayContextType Context { get; set; }
+        public string ContextItem { get; set; }
+    }
+}

YandexMusic.API/Models/Landing/Entity/Entities/Context/YPlayContextAlbum.cs

@@ -0,0 +1,9 @@
+using YandexMusic.API.Models.Album;
+
+namespace YandexMusic.API.Models.Landing.Entity.Entities.Context
+{
+    public class YPlayContextAlbum : YPlayContext
+    {
+        public YAlbum Payload { get; set; }
+    }
+}

YandexMusic.API/Models/Landing/Entity/Entities/Context/YPlayContextArtist.cs

@@ -0,0 +1,9 @@
+using YandexMusic.API.Models.Artist;
+
+namespace YandexMusic.API.Models.Landing.Entity.Entities.Context
+{
+    public class YPlayContextArtist : YPlayContext
+    {
+        public YArtist Payload { get; set; }
+    }
+}

YandexMusic.API/Models/Landing/Entity/Entities/Context/YPlayContextPlaylist.cs

@@ -0,0 +1,9 @@
+using YandexMusic.API.Models.Playlist;
+
+namespace YandexMusic.API.Models.Landing.Entity.Entities.Context
+{
+    public class YPlayContextPlaylist : YPlayContext
+    {
+        public YPlaylist Payload { get; set; }
+    }
+}

YandexMusic.API/Models/Landing/Entity/Entities/Context/YPlayContextType.cs

@@ -0,0 +1,9 @@
+namespace YandexMusic.API.Models.Landing.Entity.Entities.Context
+{
+    public enum YPlayContextType
+    {
+        Album,
+        Artist,
+        Playlist
+    }
+}