How to parse form-data format to K6

Hello I just wanna ask about to parse form-data format that contains real_url in body API.

Can somebody help me?

i tried something like this

var body = “------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=“real_url”\r\n\r\n\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW–”;

but it just invalid format, and the POST method not doing well because of it, then I got response ‘400’ from the server.