{
  "error": {
    "code": 422,
    "documentation_url": "https://developer.gocardless.com/pro#mandate_not_inactive",
    "errors": [
      {
        "message": "Mandate is already active or being submitted",
        "reason": "mandate_not_inactive"
      }
    ],
    "message": "Mandate is already active or being submitted",
    "request_id": "9aac0445-fd1e-4dc2-8854-a5a6afbaaeae",
    "type": "invalid_state"
  }
}