How to handle post request with Node.js?

Question

Node.js

I send a request to the Node server using the code

$.ajax({
        url:"/masbook"
        , type:"POST"
        , data:"bibliash22=" + JSON.stringify(studentsbooks)
        , success: function(res) {
            alert(res);
        }
});

.And you need to write code to process the POST request.
Thank you very much in advance!