Sometimes an image is worth 1000 words . In Salesforce I actually used a Number field, however, in hindsight, I should've use just plain string (TEXT). Since I do reporting on it, and always tries to calculate totals and sums. So I'd just use a Text field in Salesforce, and use the above to fill it up. Hope this helps.
cheers,
This is GREAT Victor! Anyway I can trouble you for a screenshot of the token setup?
Thank you again!
I believe this is a System token. Should be available for you, no need to create. - It might not pop up if you try to use the down arrow there. So just use this {{lead.id}}.