{
"b": ["b1","b2"],
"c": {"c1":"c1","c2":"c2"},
}
stringA = "appId=10000&b[0]=b1&b[1]=b2&c.c1=c1&c.c2=c2&nonce=Hs94gj28ka12×tamp=1709545184000";
stringSign = md5(stringA + "HKKA4sj81FakwFk9");
http://domain/api/a?appId=10000&nonce=Hs94gj28ka12×tamp=1709545184000&sign=2dsoeQW4ZEyA883lbexZUA==