How to track events emitted by Uniiverse.com's Direct Payments Platform

gistfile1.js

// Include, and initialize analytics
      
(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','//www.google-analytics.com/analytics.js','ga');

ga('create', 'UA-XXXX-Y', 'auto');
ga('send', 'pageview');
      
// Listen for open event and send it to GA
$(document).on('unii:closed', function(e) {
  _gaq.push(['_trackEvent', 'Tickets Checkout', 'Opened']);
});