curl --location --request POST 'https://kf.pikabao.cc/agent/v1/cards/cashout' \
--header 'Content-Type: application/json' \
--data-raw '{
  "appid": "user123",
  "bankCardId": "111222333",
  "amount": "50.00",
  "timestamp": "1640995200000",
  "sign": "ABC123..."
}'

const data = {
  appid: "user123",
  bankCardId: "111222333",
  amount: "50.00",
  timestamp: Date.now().toString(),
};

const sign = generateSign(data, secretKey);
data.sign = sign;

const response = await fetch("https://kf.pikabao.cc/agent/v1/cards/cashout", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
  },
  body: JSON.stringify(data),
});

const result = await response.json();

{
  "code": 0,
  "msg": "",
  "content": {
    "id": "111222333",
    "userBankCardId": "444555666",
    "userBankCardNum": "5572710152044****",
    "state": 1,
    "amount": "50.00",
    "createTime": "2023-01-01 00:00:00",
    "modifyTime": "2023-01-01 00:00:00"
  }
}