Entitlement Revoke API - Multiple Accounts per source

I am trying to REVOKE an entitlement that for someone that has multiple accounts in a source. GRANTing access seems easy enough as I can use this request body to submit the request and pick the account in one action

but it does not appear to work when I change it REVOKE_ACCESS as I get the dreaded “you’re right but you’re also wrong…”

Anyone know the magic bullet to send when some has multiple accounts in a source? For the record, this doesn’t work either

In fact, I have not een able to get ANYTHING to work to get these entitlements removed. I even tried a targeted Cert campaign with the test entitlements and identities and the campaign doesn’t even see these. It just auto-completes. Anyone have any ideas on how I can removed these?