var createRequest = { CatalogVersion : "Karts", Catalog : [{ CanBecomeCharacter : false, DisplayName : catalog.Catalog[args.kartIndex].DisplayName, InitialLimitedEditionCount : 1, IsLimitedEdition : true, IsStackable : false, IsTradable : false, ItemClass : catalog.Catalog[args.kartIndex].Class, ItemId : index, CustomData : { "owner" : currentPlayerId, "type" : 0, "level" : 0, "stamina" : 100, "hp" : 100, "mana" : 100, "speed": 20, "skill1" : 0, "skill2" : 0, "cooldown" : 0, "accessory" : "" } }] }; var createNewKart = server.UpdateCatalogItems(createRequest);I try to add a new item to catalog for my game but its not working!