2.2 Signing a message - Starpay Merchant Disbursement API

To-Be-Signed String: Prepare the message to be sent to the system in the JSON Format. (Note: Do not Format JSON message. This sample message is only Formatted for display)

Signature Rules:
For signature generation, the order of fields used for signing must be exactly the same as the order of fields in the final API request payload.

{
    "msgId": "161415460871",
    "mchId": "105510000001",
    "acctNo": "acctNoxxx",
    "acctName": "acctNamrxx",
    "acctMiddleName": "acctMiddleNamexxx",
    "acctLastName": "acctLastNamexxx",
    "receivingBank": "Sun Savings Bank, Inc.",
    "trxAmount": "1000",
    "currency": "PHP",
    "service": "pay.starpay.instapay.disburse",
    "attach": "Disbursement"
}