Use "button.activate_one_time_charge" via json-API for habridge to use with alexa

[wunderbaum]

When I activate the button in the webpage, I can see it working in the app on the mobile. Now I tried to access it via ha-bridge to get it activated via Alexa-command "turn warmwater on". The button is found in the list of entities in ha-brige. But I have no clue what kind of "message" this has to send to homeassistant. Autogenerated in habridge is: {"entityId":"button.activate_one_time_charge","hassName":"HomeAssistant","state":"on"} I guess the state parameter on is wrong, but whats the right one?