title: Is there any way for Google Analytics to track multiple event parameters like Mixpanel?
body: <p>Given:</p>
  
  <pre><code>_trackEvent(category, action, opt_label, opt_value, opt_noninteraction)
  </code></pre>
  
  <p>I tried with opt_label but it seems like it's just a string and doesn't accept a hash of different parameters like Mixpanel do. </p>
  
  <p>I suspect one of the the work around is using custom variables? But the docs seems confusing. Appreciate any advice.</p>