post_request.js

var http = require('http');

var options = {
      hostname: 'localhost',
        port: 3000,
          path: '/users/adduser',
            method: 'POST',
            headers: {"Content-Type": "application/json"}
};

var req = http.request(options, function(res) {
      console.log('STATUS: ' + res.statusCode);
        console.log('HEADERS: ' + JSON.stringify(res.headers));
          res.setEncoding('utf8');
            res.on('data', function (chunk) {
                    console.log('BODY: ' + chunk);
                      });
});

req.on('error', function(e) {
      console.log('problem with request: ' + e.message);
});

//write data to request body
usuario = {};
usuario.username = "jeymisson";
usuario.password = "asdf";
usuario.email = "test@m.com";
usuario.profile = {};
usuario.profile.name = "jeymisson";
usuario.profile.age = 25;
usuario.profile.profilePic = "url://sfa";
usuario.profile.gender = 1;
usuario.profile.degree = "superior incompleto";
usuario.profile.speciality = "Ciencia da computacao";
usuario.profile.subjects = [];

req.write(JSON.stringify(usuario));
req.end();