Redirect USB device in KVM while guest is running

I have two USB Redirector devices in my KVM, created using virt-manager: I can use these to redirect a USB device at runtime, in virt-manager by going to Virtual Machine > Redirect USB device, I can then pick which host devices to pass through the Spice channel: How do I do the same with virsh, or some other terminal tool? I would like to be able to switch it off and on, basically to move a device from one VM to another.