JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="accept" />

JavaScript

var permission = $('#accept').is(':checked') ? "Y" : "N";

var track = {
    version: 123,
    id: 123456789,
    order: {
        sv1: 'Y',
        sv2: 'N',
        sv3: 'Name',
        sv4: permission,
        orderid: '123xyz'
    }
};
console.log( track.order.sv4 );

$('#accept').change(function () {
    track.order.sv4 = this.checked ? "Y" : "N";
    console.log( track.order.sv4 );
});