SOURCE

function HmacSHA256(e){

    var t = CryptoJS.HmacSHA256(e,CryptoJS.enc.Base64.parse("X5oh6AGsqo0so5Iz9h9DhDOHP3truufLJVgkwJbugGM="));
    r = Cryptojs.enc.Base64.stringify(t);
    return r = encodeURIComponent(r);
}
    var g = {
    apiurl: "/api/gd/freerdgd/scef/userunicomPhoneJudge/v1",
    paramName: "USERUNICOM_PHONE_JUDGE_REQ",
    params: {"PHONE_NO":"175206907xx", "TOKEN" : "8eca2d59bb4ea0fda9271ed7b3544fcd"},
    stage: "1"}

S = JSON.stringify(g);
console.log(HmacSHA256(S));