get https://{tenanturl}/v1.0/admin/entitlements//children
Entitlements required: tenantadmin [Tenant Administrator], manageEntitlements [Manage Entitlements], readEntitlements [Read Entitlements].
Entitlements required: tenantadmin [Tenant Administrator], manageEntitlements [Manage Entitlements], readEntitlements [Read Entitlements].