Multiple business entities through one Zoho account

Multiple business entities through one Zoho account

Hi,

We currently have a Zoho One account for our business but are expanding and need to include a new entity.
We want to keep the two entities separate and ideally be able to use the one Zoho One account but switch between the two entities when needed. 
Is this possible?
How can I achieve this?
What would the cost be?
Thanks in advance,

Cate.