Type of hold lifecycle event
{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "#/components/schemas/hold_event_type", "title": "Hold Event Type", "description": "Type of hold lifecycle event", "type": "string", "enum": [ "HOLD_INITIATED", "HOLD_VOIDED", "HOLD_EXPIRED", "HOLD_SETTLED" ] }