how to get signed

Websocket
1

I used a string from the interface document as an argument and the result is inconsistent with the example，does it can’t just concatenate parameters with &

2

This depends on the language and method used to generate the signature. I suggest having a look at this repository for more examples on how to generate the signature.

3

I solved this problem ,I used to use base64 so I got wrong answer, thank you