This is my postman setup;

[![enter image description here][1]][1]

for the request object;

public class UploadRequest
    {
        public List<IFormFile> File { get; set; }
        public EntityType EntityType { get; set; }
        public int ReferenceId { get; set; }
    }

And it returns “Unsupported Media Type” status code 415

here is the API

[AllowAnonymous]
[HttpPost("api/[namespace]")]
public override async Task<ActionResult> HandleAsync([FromBody] UploadRequest request)
{

How can I post these data properly?
[1]: https://i.sstatic.net/vVkCzRo7.png