Google Analytics Goal Tracking Syntax

To clarify, I’m using WP 4.4.2 and the latest CF7 4.4 and I’ve tried using the syntax from the CF7 docs and every attempt still shows the Additional Headers error message about having syntax errors.

Even Google’s own reference doesn’t work:
ga(‘send’, ‘event’, ‘submission’, ‘Contact Form’);

Nor the CF7 page reference:
ga(‘send’, ‘event’, ‘Contact Form’, ‘submit’);

nor the other:
on_sent_ok: “ga(‘send’, ‘event’, ‘Contact Form’, ‘submit’);”

Please advise. Thank you.

Put it into the Additional Settings field. Not Additional Headers.

Tracking Form Submissions with Google Analytics

Thank you. :-/