await $.ajax({

    "url":"url",

    "method":"POST",

    "content-type":"appication/json",

    "data":JSON.stringify({

    "userName": "11",

    "ipAddress":    "",

    "clientType":   "WINPC_V1"

}

),

    "success":function(response){

            console.log("返回结果1"+response);

        response = typeof response == "object" ? response : JSON.parse(response);

        console.log("返回结果"+response.publickey);

        apt.variables.set("publickey", response.publickey);

        apt.setRequestBody(

            {

                "publickey": response.publickey,

                "signature": ""，// 该处需要对返回数据加密 如何操作？

                "userName": "system",

                "randomKey":response.randomKey,

                "encryptType":"md5",

                "userType": "0"

            }

            );

    }

});