{
  "event": "send",
  "msg": {
    "ts": 1365109999,
    "subject": "This an example webhook message",
    "email": "example.webhook@mandrillapp.com",
    "sender": "example.sender@mandrillapp.com",
    "tags": [
      "webhook-example"
    ],
    "opens": [

    ],
    "clicks": [

    ],
    "state": "sent",
    "metadata": {
      "user_id": 111
    },
    "_id": "exampleaaaaaaaaaaaaaaaaaaaaaaaaa",
    "_version": "exampleaaaaaaaaaaaaaaa"
  },
  "_id": "id1",
  "ts": 1384954004
}