Announcing Webhooks v2

{
  "event_id": "evt_2bH7kNwP5mQaV1sXgIdKe6pZr",
  "type": "email.delivered",
  "data": {
    "object": {
      "id": "em_4yM2nTvR8oPcX3uZiKeLg7sB",
      "object": "email",
      ...
    }
  }
}