By default, the webhook message format is:
[action.name] was triggered by [person]
The parts in square brackets
 are called message tokens. You can use tokens to customize your message based on the event that triggered the webhook. There are three types of tokens:
[event]: Type of the event (a standard one, such as
$pageview, or custom, such as
completed level). This token is formatted as a link to the event that triggered the webhook in PostHog.
[event.link]: A plain link to the event that triggered the webhook in PostHog.
[event.event]: Same as
[event]except not formatted as a link.
[event.uuid]: ID of the event. Always in UUID format.
[event.distinct_id]: Person distinct ID associated with the event.
[event.properties.property_name]: Value of property
[person]: Display name of the person. Based on the Person Display Name preference in Project Settings. If none of the properties from the preference are available, the distinct ID is used. This token is formatted as a link to the person.
[person.link]: A plain link to the person in PostHog.
[person.properties.property_name]: Value of person
[action.name]: The name of the triggered action. This token is formatted as a link to the action in PostHog.
[action.link]: A plain link to the action in PostHog.