public JsonResult DeleteMusics(List <MusicInfo> toDeleted)
        {
            string message = string.Empty;

            try
            {
                DSClient client = new DSClient(Models.Const.ApplicationId);
                int      userId;
                string   token;
                if (GetToken(out userId, out token))
                {
                    client.DeleteMusics(Models.Const.ApplicationId, userId, token, toDeleted);
                    message = "Success";
                }
            }
            catch (Exception exception)
            {
                message = exception.Message;
            }
            return(Json(new { Message = message }, JsonRequestBehavior.AllowGet));
        }