The data from the node listening port is garbled.

I use the nodejs listening terminal to send data to the designated port, the code is as follows. But the monitored data is a piece of garbled code, please give us a lot of advice!

var net = require("net");
//
var listenPort = 26123;
var server = net.createServer(function(socket){
  // socket
  console.log("connect: " +
    socket.remoteAddress + ":" + socket.remotePort);
    socket.setEncoding("binary");
  //
    socket.on("data",function(data){
  console.log("UE send:" + data);
  });
  //
    socket.on("error",function(exception){
    console.log("socket error:" + exception);
    socket.end();
  });
    socket.on("close",function(data){
    console.log("client closed!");
  });
}).listen(listenPort);
//
server.on("listening",function(){
  console.log("server listening:" + server.address().port);
});
//
server.on("error",function(exception){
  console.log("server error:" + exception);
});

< hr >

the 460113003132269 in the result is the IMSI number of my terminal, 101.132.155.126 json 26123 is the ip address and port I am listening to, and the rest of the information is garbled. I would like to ask you guys how to display these data correctly, such as serializing them into json format and so on.