{ app: 'Queue',
  endpoint: 'SIP/device/sip:device@trunk.com',
  channelId: '2bb98fc1-6f6e-4d7f-8095-e76f767235d4.test.16',
  otherChannelId: 'f840a459-e89b-4399-9317-d939e818cac4' }
/channels STATUS: 500
/channels HEADERS: {"server":"Asterisk/12.5.0","date":"Tue, 09 Sep 2014 21:53:52 GMT","connection":"close","cache-control":"no-cache, no-store","content-type":"application/json","content-length":"29"}
/channels BODY: {"error":"Allocation failed"}
ws received: {"application":"Queue","type":"PlaybackStarted","playback":{"id":"8542823a-03f6-4069-8085-4ad8071ead3d","media_uri":"/mnt/storage/common/moh/SausageIsReady.mp3","target_uri":"channel:1410299626.81","language":"en","state":"playing"}}