Helspot Admin Theme JS to add google analytics tracking code.

blue.js

var analytics_script=document.createElement('script');
analytics_script.type='text/javascript';
analytics_script.text="(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');ga('create', 'UA-xxxxxxxx-x', {'siteSpeedSampleRate': 100});ga('send', 'pageview');";
document.head.appendChild(analytics_script);