Navigate to your review widgets from Dashboards > Widgets. You will see the email signature widgets on the right side of the page.
Select type of email signature widget you would like to use and click the “Copy to Clipboard” button
In your MailChimp account, navigate to the the email template design that you want to add your email widget to.
Select the area where you would like to place the email signature, paste it and click save.
Send an email to your self and make sure it looks the way you want it to.