function generateLicense(licenseData, chiper)
{
    var chiper = chiper || "SekawanMediaInformatikaSoftwareHouse&ITConsultant";
    var signature = CryptoJS.SHA512(Ext.encode(licenseData) + chiper).toString();

    var license = Ext.clone(licenseData);
    license.signature = signature;

    return Ext.encode(license)
}

generateLicense({
    "product": "SIPAS 3.1",
    "productCode": "SIPAS",
    "productVersion": "3.1",
    "productPackage": "Enterprise",
    "userId": "pdpaljayadkijakarta",
    "userDisplay": "PD PAL Jaya DKI Jakarta",
    "userEmail": "",
    "userSite": "http://www.paljaya.com/",
    "registerDate": Date.now(),
    "trialMode": false,
    "expiredDate": (new Date('2017-03-01')).getTime(),
    "style": ""
});