HTX / Huobi error api-signature-not-valid

Question

Have a problem with HTX api. I can't succeed any request. Have

"err-code": "api-signature-not-valid",
"err-msg": "Signature not valid: Verification failure [校验失败]"

every time.

I try to get back my orders through POSTMAN.

Then, I URL encode signature.

Every time have:

{
    "status": "error",
    "err-code": "api-signature-not-valid",
    "err-msg": "Signature not valid: Verification failure [校验失败]",
    "data": null
}

Can someone help me?