var json:NSString;
json = NSString(format:"{"und":[{"value":"2324"}]")
var data:NSData = json.dataUsingEncoding(NSUTF8StringEncoding)!
var dataDic:NSDictionary = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.AllowFragments, error:nil) as! NSDictionary