# card.transaction.on_hold Card Transaction - On Hold Event Endpoint: POST card.transaction.on_hold Version: Version: fd60d28d ## Request fields (application/json): - `event_id` (string, required) - `timestamp` (string, required) - `payload` (object, required) - `payload.card_id` (string, required) - `payload.amount` (integer, required) - `payload.account_id` (string, required) - `event_type` (any, required)