We have the Facebook lead ads integration set up and whenever someone fills out a leadgen form, the activity is passed along into Marketo with a unique leadgen ID for that person. We would like to post that leadgen ID into a person level field so we can sync it to SFDC. I have seen online that you can use trigger tokens for custom activities to stamp those values to a field, but I am not sure if the 'Filled out Facebook Lead Ads Form' trigger works in the same way as the custom activity triggers and works with these trigger tokens.
Any ideas on how to get that value from the activity into a person level field?