curl --location '/api/v1/ex/crypto/rates?pair=USDT%2FUSD%EF%BC%8CUSDC%2FUSD&merchantNo=%E5%95%86%E6%88%B7%E5%8F%B7&transactionType=%E4%BA%A4%E6%98%93%E7%B1%BB%E5%9E%8B%EF%BC%8C%E9%BB%98%E8%AE%A4%E4%B8%BA%EF%BC%9ACR_CRYPTO_TO_FIAT(%E9%BB%98%E8%AE%A4)' \
--header 'x-app-id;' \
--header 'x-request-id;' \
--header 'x-signature;'{
"code": "string",
"message": "string",
"data": {
"base": "string",
"quote": "string",
"pair": "USDT/USD",
"rate": 0,
"rateTime": "string"
}
}