How to get back response from TD to node.js application

I’ve been set up node.js application as remote tool for TD.

I’ve been using this nicely written script

ianshelanskey.com/2017/03/23/si … hdesigner/

Everything work perfect, but i dont know what command should i use to get callback from TD to nodejs.

Whatever function i use, this part of data

client.on('data', (data) => { console.log(data.toString()); client.end(); });

is never triggered.