RESTful Switch not created?

Configuration
1

I’m trying to use the RESTful Switch (with my Blynk server), but the switch isn’t showed in the UI… rather, it seem like to not be created, indeed the switch is not prsent not even in the entities list.
In the logs no error are showed and the config pass the check.

This is my switch…

  - platform: rest
    name: riscaldamento_on_off
    resource: https://192.168.1.189:9443/2affa38aa6f245d39dff7ff0ff2ec4c7/update/V2
    method: put
    body_on: >- 
      {{ ["1"] }}
    body_off: >-
      {{ ["0"] }}

Testing the URL with CURL all works fine, so… where I’m wrong?