curl --location --request POST '/AG_MerchantManagementSystem_Core/agent/api/gen' \
--data-urlencode 'version=1.0' \
--data-urlencode 'clientCode=66848777' \
--data-urlencode 'MAC={{MAC}}' \
--data-urlencode 'contractNo=MM20221228000000929' \
--data-urlencode 'messageType=ALTERCONTRACT' \
--data-urlencode 'backUrl=' \
--data-urlencode 'merTrace=63a9694f3e10af5a07dfd259' \
--data-urlencode 'operaTrace=12022122816120258001' \
--data-urlencode 'signatoryName=主店'
{
"operaTrace": "12022122816120258001",
"messageType": "ALTERCONTRACT",
"clientCode": "66848777",
"retCode": "0000",
"retMsg": "操作成功",
"version": "1.0",
"MAC": "752146C8A64B8B881E27D333CB729507"
}