 {
     enum Property:String
     {
+        case album = "album"
         case created = "created"
         case status = "status"
         case size = "size"

    required init(snapshot:Any)
    {
        let snapshotDict:[String:Any]? = snapshot as? [String:Any]
        
        if let created:TimeInterval = snapshotDict?[Property.created.rawValue] as? TimeInterval
        {

    override func modelJson() -> Any
    {
        let json:[String:Any] = [
            Property.album.rawValue:album,
            Property.created.rawValue:created,
            Property.status.rawValue:status.rawValue,
            Property.size.rawValue:size
