Filter entitlements by list of exact ids (returns entitlement if and only if every grantee passed in is present in the entitlement and no other grantees are present)
example: grantee_external_ids_exact=grantee_a,grantee_b returns entitlements with both grantee_a and grantee_b, but not entitlements with just grantee_a or entitlements that have grantee_a, grantee_b, but also grantee_c