[b]"Having trouble with a curl POST request? Need help sending data correctly?"[/b] Alternatively: [b]"How do I pr

Formal reply:
The issue might be related to how the JSON payload is structured. Ensure there are no trailing commas or unescaped special characters.

A properly formatted curl post request with JSON should look like this:
```bash
curl -X POST \
https://your-api-endpoint.com/data \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_TOKEN" \
-d '{"username":"test", "password":"secret"}'
```

If the request hangs, inspect network traffic with tools like Wireshark or Charles Proxy to identify where the failure occurs.