Record a contact event

Records a custom contact event. Identify the contact by exactly one ID, external ID, or email. A missing email or external ID creates a contact; an unknown contact ID returns 404. An organization-scoped idempotency key replays the original event. Event names use letters, digits, underscores, hyphens, and dots, up to 255 characters; contact. and samva. prefixes are reserved. Properties allow at most 50 keys and 32 KiB of UTF-8 JSON. Events are retained for 90 days.