First create the rest command pushcut_smart_notify in configuration.yaml
rest_command:
pushcut_smart_notify:
url: 'https://api.pushcut.io/v1/notifications/{{notification}}'
method: POST
content_type: application/json
headers:
API-Key: !secret pushcut_api_key
payload: '{{payload}}'
Then create in scripts.yaml the script notify_pushcut_smart as shown in my previous post.
Finally you call the script as shown in the example in my previous post.
See also the documentation WebAPI for Pushcut.
Indeed if you go through all the previous posts in this thread you will get all the needed instructions on how to setup things. This is what I did. 