I dont have a wet-dry shop vac, or I would have used that. I laid dry towels on it and stepped them into the spot. Then used more towels and repeated a few more times.
Since then I have been using a heat gun on the spot. moving it quickly so I dont burn the carpet. It's partly dry at the surface but I can tell the padding is still wet.
Just thought I'd post this to see if anyone has other tips...
(No, I'm not gonna remove the carpet).