We are trying to find a third-party pixel on successful sign-up of the newsletter:
Newsletter | E! Online | The Rundown
We placed a Data Attribute on the successful sign-up which happens after clicking on Sign-up button and displays "Thank you for Subscribing" message:
- data-omniture = "newsletter-signup-success"

Now, I am placing an Event rule to fire when this data attribute occurs on the page on successful sign-up, but I am unable to make the script fire. Below shows my conditions:

I'd appreciate any help in solving this and letting me know how to set the conditions correctly.
Thank you in advance!