Approves or rejects a payment for processing on the next processing cycle. This service will mark a pending transfer as appoved by the current user increasing the approval count. When the approval count equals or exceeds the required approval count the payment becomes available for committing to transfer processing. If the apporval state in the body is false then the payment is rejected by the user and the payment must wait for another approval or a cancellation. A rejection only records the rejection details in the approval log.