Creating Firewall Objects via Sophos Central

Is it possible to create firewall objects (host, host groups, services, etc.) via the Cental API?
That would be a great use case for us. We operate a network with approx. 80 locations, and the trend is rising. I have automated the entire firewall deployment via PowerShell scripts. However, I need objects from Sophos Central for my firewall rules. Unfortunately, I have to create the objects in Sophos Central manually in advance. I would also like to automate this.