example input data:
PayloadKey: 4dcc8d3c37783b10949b2d18a2f1fc5e
Payload: "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"

after decrypting you should get:
 {
            "camp": "personal_1550487606264",
            "products": [
                "coin_100000",
                "coin_10000000",
                "coin_20000",
                "coin_200000",
                "coin_2000000",
                "coin_30000",
                "coin_30000000",
                "coin_400000",
                "coin_5000",
                "coin_6000000"
            ],
            "priceFactor": 1,
            "countFactor": 1.6,
            "finishedAt": 1550575078799,
            "redeemable": false,
            "activatedAt": 1550488678799,
            "user": "08342e37-66d0-4229-ba1d-db5f437647f7",
            "now": 1550487967234
        }