Remove JsonIgnore from the DateLastSaved property of BaseItem

MediaBrowser.Controller/Entities/BaseItem.cs

@@ -549,7 +549,6 @@ namespace MediaBrowser.Controller.Entities
         [JsonIgnore]
         public DateTime DateModified { get; set; }
 
-        [JsonIgnore]
         public DateTime DateLastSaved { get; set; }
 
         [JsonIgnore]