Calculate order: What should service_charges -> catalog_object_id be?

On POST /v2/orders/calculate
every service_charges object has an optional catalog_object_id

What type of object can this be? I tried with item variants and taxes but I got ‘not found’ errors. The doc on this is pretty vague.

:wave: Currently, service charge object IDs aren’t yet available with our APIs. You can set them in the Dashboard however retrieving them and applying them to orders isn’t yet available. We’re constantly working to improve our features based on feedback like this, so I’ll be sure to share your request to the API product team. :slightly_smiling_face: