Syncthing - change user

Hi all

I follow this excellent tutorial to install a newer version of syncthing on a Raspberry Pi:

but when I start the service, it comes up as root (with the warning "Syncthing should not run as a privileged or system user").

Is procd_set_param user nobody a possible solution?
If so, how can I change init.d script to start as a different user?

kind regards,
Mourão

Any help would be greatly appreciated.