How to submit via api?

Hi, Thank for your help about install domjudge. Now it work ok and I want to submit problem via api. /domjudge/api/submissions <http://dj5.cachhoc.net/domjudge/api/submissions> (POST) I read the document api but I can not know how to use it. I want use php to post submission, and now I test on postman but don't know what are fields to post data. -- _________________________ Name: Nguyen Van Quan Come from: OTVINA company Email: nguyenvanquan7826@gmail.com Blog: nguyenvanquan7826.com Phone: +84.96.567.7826