Add/update Product Options Via Api

Hello to all,
someone can tell me how I can assign Options to Products via API?
The documentation (http://docs.cs-cart.com/4.3.x/api/entities/products.html) does not describe how to set the Options via API.
Someone can help me?
Thank you.

I am afraid, additional code modifications are required to extend the API in such a way

I am afraid, additional code modifications are required to extend the API in such a way

so I have no way to set the Options for the product via API without extending them?