How to save only child with one to many relationship

Hi all,
I tried to save a child object when the parent is not mandatory to save with bi-directional one-to-many relationship enabled.

My example looks like


I need to save address only and with a foreign key constraint of company_id in address and not nullable.

How the request json should be and how to achieve it with Spring Boot + Hibernate?

If I need to add some extra step to make it work, please help me.