Pause campaign

{
  "success": true,
  "data": {
    "id": "string",
    "name": "string",
    "audience_id": "string",
    "status": "pending",
    "total_count": 0,
    "sent_count": 0,
    "delivered_count": 0,
    "read_count": 0,
    "failed_count": 0,
    "from": "string",
    "created_at": "2019-08-24T14:15:22Z",
    "started_at": "2019-08-24T14:15:22Z",
    "completed_at": "2019-08-24T14:15:22Z",
    "aborted_at": "2019-08-24T14:15:22Z"
  }
}

{
  "success": false,
  "error": {
    "code": "string",
    "message": "string",
    "request_id": "string",
    "details": [
      {
        "path": "string",
        "code": "string",
        "message": "string"
      }
    ]
  }
}