JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>

JavaScript

var result = {
  "success": true,
  "instances": [
    {
      "InstanceId": "428",
      "content": "1234"
    },
    {
      "InstanceId": "429",
      "content": "4321"
    },
    {
      "InstanceId": "427",
      "content": "im a rebel"
    }
  ]
}

var old = result.instances;
console.log(old, 'old');
result.instances.sort(function(a, b) {
  return a['InstanceId'] - b['InstanceId'];
});
console.log(result.instances, 'new');