What zwave2mqtt payload to turn on a Telldus plug-in switch?

[harelabb]

Hi.
I am using zwave2mqtt to try and switch on a wall switch.
In the zwave2mqtt settings (myPi:8091) it is called Switch (6-37-1-0).
No value name or type, only a switch widget.
My zwave2mqtt prefix is "zwave", so I thought the topic should be
"zwave/6/37/1/0/set"

But what should the payload be?
Or is this a totally wrong question?

[harelabb]

In reply to myself:
Found out:
{"label":"Switch","value":true}