How do I add AudioEye's Javascript to my HubSpot site?

1. Once logged in to your AudioEye account, add your site and copy your Javascript Embed Code to your clipboard. 
2. In your HubSpot account, click the settings icon settings in the main navigation bar.
3. In the left sidebar menu, navigate to Website > Pages.
4. Click the dropdown menu to select the domain you want to update settings for. 
5. Locate the default HTML applied to templates for the selected domains.
6. Paste the AudioEye javascript right before the end of the body tag </body> across all of your pages. 

Source:

https://knowledge.hubspot.com/cos-general/how-can-i-add-code-snippets-to-the-head-and-footer-html-of-my-pages