How to update BDM row through API Rest?

I need to update a business object of an ongoing case outside of it, for example the user inputs a contract, which is saved in the bdm, then for an unknown reason this needs to be updated, I don't want to have an extra task, I need to update the bdm via API Rest, I can get the model name and persistence id, but can't find a way to update it.

Is there a way to do it? If so, could you give me a hand with this?

Thanks