{"statusCode": 200, "headers": {"Content-Type": "application/json"}, "body": "{\n  \"message\": \"Header echo response\",\n  \"total_headers_count\": 0,\n  \"total_headers_size_bytes\": 0,\n  \"total_wire_size_bytes\": 0,\n  \"headers\": {},\n  \"multi_value_headers\": {},\n  \"header_sizes\": {}\n}"}