{timestamp}
{nonce}
{identity}
{client_id}
{merchant_id}
{request_method} - Example: “POST”, "GET"
{url}
{payload} - this is “Request data/body”
{signature}
{"a": "b"}
will become {"a":"b"}
in payload, if true {"a":"b"}
will become {"a": "b"}
in payload
“Sort request data keys”
Example: If true {"b": "1", "a": "2"}
will become {"a": "2", "b": "1"}
in payload
{"signature": "X-Signature", "timestamp": "X-Timestamp", "client_id": "X-Client-Id"}
{timestamp}{client_id}{request_method}{url}{payload}
{signature}