curl --location --request POST 'https://mtest.eycard.cn:4443/AG_MerchantManagementSystem_Core/agent/api/gen' \
--data-urlencode 'messageType=CONTRACTQUERY' \
--data-urlencode 'clientCode=63754675' \
--data-urlencode 'version=1.0' \
--data-urlencode 'MAC=72767BDCFE9AD9EFAFB3579D039F0410' \
--data-urlencode 'merTrace=61bfe1051faf202cd074a52e'{
"messageType": "string",
"clientCode": "string",
"retCode": "string",
"retMsg": "string",
"version": "string",
"MAC": "string",
"data": "string"
}