{
  "data": {
    "job_id": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
    "upload_uri": "https://s3.amazonaws.com/path/to/your/upload_location",
    "upload_headers": [
      {
        "header": "Content-Type",
        "value": "text/csv"
      },
      {
        "header": "x-amz-meta-job_id",
        "value": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
      }
    ],
    "_metadata": {
      "self": "https://api.sendgrid.com/v3/marketing/contacts/imports/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
    }
  }
}