How to pass an image from the mobile application to the Adobe Media Server?

private function imageLoading():void

                              {

                                        var req:URLRequest = new URLRequest(image file url path);

                                        var urlLoader:URLLoader = new URLLoader(req);

                                        urlLoader.addEventListener(Event.COMPLETE, onURLLoaderComplete);

                                        urlLoader.dataFormat = URLLoaderDataFormat.BINARY;

                                        urlLoader.load(req);

                              }

                              private function onURLLoaderComplete(event:Event):void

                              {

  imageByteArray = event.target.data;

                              }

This imageByteArray is passed to the Server. Server received this bytearray as an Object. How to get the raw  bytearray data from this object in Server side?