Multiple includes for api/deals/[id]?

Is there a way to get two different “includes” from the single GET request? I want to know the deal owner, and the primary contact.

I have tried:
"path": "/crm/sales/api/deals/<%= context.dealId %>?include=contacts&include=owner"
and
"path": "/crm/sales/api/deals/<%= context.dealId %>?include=contacts,owner"

But either one only gives the first. I do not want to make a second API call to get this information. Any ideas?