{
  "summary": "Bulk create subscribers",
  "method": "POST",
  "path": "/v4/bulk/subscribers",
  "tag": "Subscribers",
  "request_body": {
    "subscribers": [
      {
        "first_name": "string",
        "email_address": "string",
        "state": "active"
      }
    ],
    "callback_url": "string"
  },
  "response": {
    "subscribers": [
      {
        "id": 1,
        "first_name": "string",
        "email_address": "string",
        "state": "active",
        "created_at": "string"
      }
    ],
    "failures": [
      {
        "subscriber": {
          "first_name": null,
          "email_address": null,
          "state": null,
          "created_at": null
        },
        "errors": [
          null
        ]
      }
    ]
  }
}