node.js to crystal named pipe

send.js

const exec = require('child_process').exec;

var obj = {
    "name":"太郎",
    "age": 30,
    "area":"Tokyo"
}
 
const json = JSON.stringify(JSON.stringify( obj ));
console.log(json)
exec("echo " + json + " > ~/Work/hogepipe", function(err, stdout, stderr){
  console.log(stdout)
});