{
  "token": "one-long-verification-token",
  "team_id": "T061EG9R6",
  "api_app_id": "A0PNCHHK2",
  "event": {
    "type": "message",
    "channel": "G024BE91L",
    "user": "U2147483697",
    "text": "Let's make a pact.",
    "ts": "1355517523.000005",
    "event_ts": "1355517523.000005",
    "channel_type": "mpim"
  },
  "type": "event_callback",
  "authed_teams": [
    "T061EG9R6"
  ],
  "event_id": "Ev0PV52K21",
  "event_time": 1355517523
}