code: def _build_validation_payload(self, request):
          
          parsed = urlparse(request.url)
          path = parsed.path
          query_string = parsed.query or ''
  
          return ValidationPayload(
              method=request.method,
              path=path,
              query_string=query_string,
              all_headers=request.headers,
              signed_headers=ValidationClient.__SIGNED_HEADERS,
              body=request.body or ''
          )
docs: Extract relevant information from request to build a ClientValidationJWT
          :param PreparedRequest request: request we will extract information from.
          :return: ValidationPayload