{
    "type": "recommendation",
    "user_id": "86c50170b8acde454c645ade35f24d78",
    "candidate_category": "book",
    "candidate_list": [
        "1318554",
        "6406036",
        "7784089",
        "1734401",
        "23784945",
        "6741262",
        "26154053",
        "23903751",
        "222129",
        "15790897",
        "13069502",
        "290442",
        "6625207",
        "96087",
        "1322355",
        "18373336",
        "23686614",
        "460624",
        "24886016",
        "878967"
    ],
    "loc": [
        -1,
        -1
    ],
    "data type": "real"
}