Attach more temporary files to a service desk at once

Hi guys,
I’m stuck with uploading temporary files to a service desk. By the endpoint documentation it is possible to attach more than one file in a single request where for the response we will get array of temporary attached file id’s.

For the single file upload “multipartFormData” property looks like and it works:

multipartFormData: {
            file: [
              { filename },

but can’t figure out how multipartFormData property needs to look like for more files. I tried few attempts with files as arrays but nothing works