public function iconUpload($data)
  {
    $crc = crc32($data);
    $size = strlen($data);

    $upload = $this->transferInitUpload(rand(0x0000, 0xFFFF), 0, "/icon_" . $crc, $size);
    $transfer = \ManiaLivePlugins\Standard\TeamSpeak\TeamSpeak3\TeamSpeak3::factory("filetransfer://" . $upload["host"] . ":" . $upload["port"]);

    $transfer->upload($upload["ftkey"], $upload["seekpos"], $data);

    return $crc;
  }