2- Copy your Webhook URL from the main page of the app:
You can find the Webhook URL here on the main page of the Flow Helper app:
3- Download this flow template and import it
This will give you a good starting point - you can see how the Run Code step parses the payload. Because Flow input fields need to be defined individually, in order to support generic webhooks, we're passing them into Flow as stringified JSON and then parsing them into an object within the flow.