我正在尝试使用 Bitstamp 的私有 api 来查询我的帐户余额。我相信我发布了正确的数据，因为没有返回错误，但 Bitstamp 的答案始终为空
* Trying 107.154.249.133...
* Connected to www.bitstamp.net (107.154.249.133) port 443 (#0)
* ALPN, offering http/1.1
* Cipher selection:
ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
* successfully set certificate verify locations:
* CAfile: /etc/ssl/certs/ca-certificates.crt
CApath: /etc/ssl/certs
* NPN, negotiated HTTP1.1
* SSL connection using TLSv1.2 / ECDHE-RSA-AES256-GCM-SHA384
* ALPN, server did not agree to a protocol
* Server certificate:
* subject: OU=Domain Control Validated; CN=*.bitstamp.net
* start date: Apr 8 14:11:39 2015 GMT
* expire date: Apr 8 15:48:13 …