Shelly Cloud API V2

Hy

My Shelly Cloud sensors haven’t been working for a few days. The Shelly page mentions a switch to V2 of the API.
However, this requires changing the content type to JSON. Additionally, up to 10 sensors should be able to be triggered with a single call.
I’ve been trying to make the switch for some time now, but unfortunately, without success.
Does anyone already have Shelly Cloud App V2 running or can help me with the switches?

# Relais Klimaanlage
- resource: https://shelly-177-eu.shelly.cloud/v2/devices/api/get?auth_key=xxxxxxxxxx
  method: POST
  payload: "@data.json"
  headers:
    User-Agent: Home Assistant
    Content-Type: application/json
  scan_interval: 2

  sensor:
    - name: Blumenherz Klima Power
      value_template: "{{ value_json['0']['status']['switch:0']['apower'] }}"
      unit_of_measurement: "W"
      state_class: measurement
    - name: Blumenherz Klima Spannung
      value_template: "{{ value_json['status']['switch:0']['voltage'] }}"
      unit_of_measurement: "V"
    - name: Blumenherz Klima Strom
      value_template: "{{ value_json['status']['switch:0']['current'] }}"
      unit_of_measurement: "A"
    - name: Blumenherz Klima Temperatur
      value_template: "{{ value_json['status']['switch:0']['temperature']['tC'] }}"
      unit_of_measurement: "°C"

  binary_sensor:
    - name: Blumenherz Klima Relais Status
      value_template: "{{ value_json['status']['switch:0']['output'] }}"
    - name: Blumenherz Klima online testen
      value_template: "{{ value_json['status']['cloud']['connected'] }}"

Call payload (data.json)

{
  "ids":"xxxxxxxxxx",
  "select":"status"
}

Call configuration.jaml

# Shelly Cloud API - Basement Sensor
rest: !include Shelly-Cloud-Test.yaml

Thanks for your Help