{
  "messages": [
    "M-DEMO-1",
    "M-DEMO-2",
    "M-DEMO-3"
  ],
  "events": [
    {
      "id": "E1",
      "message": "M-DEMO-1",
      "type": "email.sent"
    },
    {
      "id": "E2",
      "message": "M-DEMO-1",
      "type": "email.delivered"
    },
    {
      "id": "E2",
      "message": "M-DEMO-1",
      "type": "email.delivered"
    },
    {
      "id": "E3",
      "message": "M-DEMO-2",
      "type": "email.sent"
    },
    {
      "id": "E4",
      "message": "M-DEMO-2",
      "type": "email.bounced"
    },
    {
      "id": "E5",
      "message": "M-DEMO-3",
      "type": "email.sent"
    }
  ]
}