发送数据：
{
    "corp_token": "0be20a78a0614abb4ace266263a900c0",
    "timestamp": 1676857173,
    "data": {
        "product_code": ""
    },
    "process_id": "0ykVJTMaf"
}

secret:ZRWO4aDifI1qOsILbTnhNtZBf1Z9r22B
签名步骤1生成字符串：corp_token=0be20a78a0614abb4ace266263a900c0&data={"product_code":""}&process_id=0ykVJTMaf&timestamp=1676857173
步骤2拼接：
ZRWO4aDifI1qOsILbTnhNtZBf1Z9r22Bcorp_token=0be20a78a0614abb4ace266263a900c0&data={"product_code":""}&process_id=0ykVJTMaf&timestamp=1676857173

步骤3MD5处理：
2b826ddddca0872fc1502176920a6b0e

最终发送数据：
{
  "corp_token": "0be20a78a0614abb4ace266263a900c0",
  "timestamp": 1676857173,
  "data": {
    "product_code": ""
  },
  "process_id": "0ykVJTMaf",
  "sign": "2b826ddddca0872fc1502176920a6b0e"
}