username:passwordAuthorization: Basic *****************curl --location --request POST '/Transactions/SendSignatureCodeForTransactions' \
--header 'Authorization: Basic <encoded-value>' \
--header 'Content-Type: application/json' \
--data-raw '[
{
"signMode": 0,
"transactionId": "75906707-8c31-479c-b354-aa805c4cefbc"
}
]'