Signature Error Troubleshooting:
1. Check the format of the original message.
2. Manually concatenate the data to be signed based on the message.
3. Output the data to be signed generated by the code.
4. Compare the two sets of data to ensure they are identical.
*If the signature data matches but the issue persists, please provide the contents of steps 2 and 3 and contact the 17TRACK technical support team for further assistance.