The following custom template for Google Tag Manager, will help adding Sleeknote to your sites.
Sleeknote is a customer engagement tool, mostly focused on Ecommerce Websites.
The setup is pretty simple, just add your account ID within the Account ID textbox in the tag.
Where do I find my Account ID
Where can I download the template
Download: https://github.com/thyngster/gtmtemplates/tree/master/Sleeknote