curl --location --request POST '/gateway-api/deposit/balance' \
--header 'Content-Type: application/json' \
--data-raw '{
"username": "merchant1",
"timestamp": "1750520481407",
"sign": "0DF58241B967D7EEB0C97D8D1547548C"
}'{
"code": 200,
"msg": "OK",
"data": {
"balance": 100
}
}