Hello. How to create an Entity Class for Date Bass?
I need to add a physical object.

Generally this system will be deprecated in a future release. Though there is no time stamped for this yet, something to bear in mind.
What is the use-case for this? What are you trying to achieve? Perhaps there is another solution.

For creating new entity classes you might want to take a look at this doc page.

Thanks for the link! I needed to create a physical object class in order to use the Entity Spawn node.