{
"merchantNo": "66629077011GZTQ",
"accountTypeCode": "1"
}curl --location '/agent/openapi/mer/v1/queryBalance' \
--header 'Sign-Algorithm: RSA' \
--header 'Content-Type: application/json' \
--data '{
"merchantNo": "66629077011GZTQ",
"accountTypeCode": "1"
}'{
"merchantNo": "66629077011GZTQ",
"balance": 100
}