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JavaScript

var json = '{
        "subscriberId": "123",
        "mdn": "888",
        "paymentType": "credit",
        "deviceType": "mobile",
        "planOfferName": "mock plan",
        "bonusOfferName": "mock bonus",
        "planDisplayName": "mock display",
        "bonusDisplayName": "mock bonus display",
        "planServiceName": "mock service",
        "nextBillingDate": "01/01/2020",
        "nextBillingTime": "00:00",
        "planEffectiveDate": "01/01/2018",
        "prepaidAmtFunds": "64",
        "dataManager": true,
        "restricted": false,
        "hotlined": false,
        "groupType": "mock",
        "data": {},
        "topUp": {},
        "loyalty": {},
        "purchasedDataPassList": [],
        "compatibleDataPassesList": []
    }';

var parsed = JSON.parse(json);
console.log(parsed);