File _service of Package spotify-client

<services>
  <service name="download_url">
    <param name="url">https://api.snapcraft.io/api/v1/snaps/download/pOBIoZ2LrCB3rDohMxoYGnbN14EHOgD7_89.snap</param>
    <param name="filename">spotify-client.snap</param>
  </service>
</services>