Arranging Entities in Hierarchical Format within Domains

Original Slack Thread

Query regarding domains - Is it possible to arrange entities in hierarchal format ? Something like - Marketing domain having subdomains and then adding entities under the subdomains or create more subdomains?
We wanted a bit of a tree structure to organize the entities.

<@U05NL481NKY> Support for sub-domains is coming cc <@U0121TRV0FL> for tentative timeline