{
  "error": {
    "message": "Invalid document structure",
    "documentation_url": "https://developer.gocardless.com/pro#invalid_document_structure",
    "type": "invalid_api_usage",
    "request_id": "bd271b37-a2f5-47c8-b461-040dfe0e9cb1",
    "code": 400,
    "errors": [
      {
        "message": "Root element must be an object."
      }
    ]
  }
}