{
  "age": 242352,
  "content": {
    "version" : 0,
    "call_id": "12345"
  },
  "origin_server_ts": 1431961217939,
  "event_id": "$WLGTSEFSEF:localhost",
  "type": "m.call.hangup",
  "room_id": "!Cuyf34gef24t:localhost",
  "user_id": "@example:localhost"
}