function enc(e){
    var t = f()
    , n = p("mmkt" + e, t);

    return t+n;
}

function f() {
    var e = Math.floor(100 * Math.random()) + 125
      , t = Math.floor(200 * Math.random())
      , n = t + e;
    return String.fromCharCode(n) + String.fromCharCode(t)
}

function p(e, t) {
    var r= t.charCodeAt(0) - t.charCodeAt(1)
    var s='';
    for(let i=0;i<e.length;i++){
        var o=e.charCodeAt(i)+r;
        s+=String.fromCharCode(o)
    }
    return s
}


function dec(e){
    e=e+''
    var k=e.slice(0,2)
    k=k.charCodeAt(0)-k.charCodeAt(1)
    var s=''
    for(let i=2;i<e.length;i++){
        var n=e.charCodeAt(i)
        s+=String.fromCharCode(n-k)
    }
    return s
}

var data=enc('{"userName": "17628818007", "password": "12345678ik", "countryType": 86, "equipment": {"deviceBrand": "Chrome", "deviceModel": "119.0.0.0", "operationSystem": "Windows 10", "operationSystemVersion": "10.0", "serviceProvider": "", "resolutionHeight": 960, "resolutionWidth": 1707}}')
console.log(data)

console.log(dec(data))