public byte[] ExecuteKeyRequest(UUID uuid, MediaDrm.KeyRequest request)
 {
     var url = request.DefaultUrl;
     if (string.IsNullOrEmpty(url))
     {
         url = PlayreadyTestDefaultUri;
     }
     return ExoPlayerUtil.ExecutePost(url, request.GetData(), KeyRequestProperties);
 }
 public byte[] ExecuteProvisionRequest(UUID uuid, MediaDrm.ProvisionRequest request)
 {
     var url = request.DefaultUrl + "&signedRequest=" + System.Text.Encoding.ASCII.GetString(request.GetData());
     return ExoPlayerUtil.ExecutePost(url, null, null);
 }