Configure your Webhooks destination by setting the webhook URL to your Heroku
app, eg: https://<APP_NAME>.herokuapp.com/api/<SOURCE>, where APP_NAME is
your Heroku app name and SOURCE should be the name of the Segment source you are
retrieving events from.
Activate the webhook destination.
You should start receiving events in your Datadog dashboard, named segment.event.
Datadog tags are included like source, type and event (segment source, type of event (track)
and event name, respectively). You can customize app.py file to add your own
tags or also monitor other type of events, eg: page events.