template:
  - trigger:
    - platform: event
      event_type: "MY_EVENT"
    sensor:
        - name: "Test Name"
          state: "{{ trigger.event.data.args[0].strength }} "

{
    "event_type": "MY_EVENT",
    "data": {
        "args": [
            {
                "strength": 16
            }
        ],
        "other_value": 289
    },
    "origin": "REMOTE",
    "time_fired": "2021-07-29T13:04:51.531943+00:00",
    "context": {
        "id": "dc2aa96aca162aea466f9375d99c74d1",
        "parent_id": null,
        "user_id": "9183bd9494d04367bfeb4b6fcf686564"
    }
}