BI Embedded - Saving reports in tenant workspaces

Hi all - 

We are embedding reports in our multi-tenant webapp, and have it set up so when users view reports they are actually looking at a master workspace, which serves as a library of shared visuals/templates using RLS, and then can copy/save reports from the library to their assigned workspace, but when we try to allow them to create reports from scratch the report saves in the master workspace, and not the one assigned to the tenant.

We have messed with the create report in the Java SDK, but havent had any luck! It seems like we just need an API endpoint that would specify the dataset and group GUID...

Thanks!