Hi, I am working to integrate the same from into my own site. It looks as the only unique id is "m" which has the value of "1101529521539" I'm assuming that is the customer number of some type. How can I find mine or get this same form working for my account.
If you go through the process to generate your signup form in your account you can find your unique value for that. To create your signup form so you can see that value, login to your account and go to:
Contacts>>Grow My Contact List>>Get a link to my website signup form
Then press next (twice) until you get to the last page with the HTML code. You can find your unique account value in that code.
API Support Specialist