Events consist of:
An event name like $pageview or query completed. Events starting with $ are PostHog defaults.
A distinct_id which is a unique identifier for person, commonly a uuidv7 value like 018daf23-89b3-7cf8-a4f1-94064c96df90
A timestamp in ISO 8601 format, which is the time the event occurred like 2024-05-22T17:09:29.220Z. This is most commonly now(), but can also be in the past.
properties, which are additional data like color or $current_url. Properties starting with $ are PostHog defaults.