public TransactionResponse SubmitSecondaryTransaction(string transactionId, SecondaryTransaction payload, string storeId = null, string region = null)
{
Signature signatureService = GetSignatureService();
string messageSignature = signatureService.Sign(JsonConvert.SerializeObject(payload));
return(payApi.SubmitSecondaryTransaction(
CONTENT_TYPE,
signatureService.ClientRequestId,
GetApiKey(),
signatureService.TimeStamp,
transactionId,
payload,
messageSignature,
region,
storeId
));
}