Capture UTMs for Mailchimp

Hi there,

I use Webflow, and I would like to capture the UTM of my marketing campaigns and send them to the info collected by Mailchimp.

I use the POST method for the contact form. I have found some explanations, but nothing seems to work.

Can someone help or share the right threat for this issue?


Here is my site Read-Only: LINK
(how to share your site Read-Only link)