I’m trying to send data (two strings in this case) from the .jsx file to an endpoint C# method. However, I’m only able to hit the endpoint if I leave its signature without parameters. If I try ‘String[] args’ or any other signature I get an “Unsupported Media Type” error. I verified that the parameters are in the ‘el’ parameter but how do I get them to the C# method?

.jsx:

async function SendCookieData(el) {
const response = await fetch('cookie',
    {
      method: "PUT",
      body: JSON.stringify(el)
    });
const data = await response.json();
}

endpoint:

 [HttpPut(Name = "cookiesubmit")]
 public IEnumerable<Cookie> Put(String[] args)
 {
       ...
 }