def serialize_history(row, actor_name=None, organizer_email=None, attendee_emails=None) -> dict:
    return {
        "id": str(row.id),
        "user_id": str(row.user_id) if row.user_id else None,
        "inbox_id": row.inbox_id,
        "manual_upload_candidate_id": (
            str(row.manual_upload_candidate_id) if row.manual_upload_candidate_id else None
        ),
        "event_type": row.event_type,
        "entity_type": row.entity_type,
        "entity_id": row.entity_id,
        "from_value": row.from_value,
        "to_value": row.to_value,
        "description": row.description,
        "actor_id": str(row.actor_id) if row.actor_id else None,
        "actor_name": actor_name,
        "actor_kind": row.actor_kind,
        "meta": row.meta,
        "organizer_email": organizer_email,
        "attendee_emails": attendee_emails or None,
        "created_at": row.created_at.isoformat() if row.created_at else None,
    }