{
  "error": {
    "documentation_url": "https://developer.gocardless.com/pro#validation_failed",
    "message": "Validation failed",
    "type": "validation_failed",
    "code": 422,
    "request_id": "dd50eaaf-8213-48fe-90d6-5466872efbc4",
    "errors": [
      {
        "message": "Bank account already exists"
      }
    ]
  }
}