网站对一维数组进行编码，生成 json 字符串。如何解码并找到 json 数据

Question

我在调用 API 时得到的响应如下：

{
    "isPacked": true,
    "payload": [
        31,
        139,
        8,
        0,
        0,
        0,
        0,
        0,
        0,
        3,
        117,
        83,
        205,
        110,
        219,
        48,
        12,
        126,
        23,
        158,
        221,
        64,
        146,
        37,
        89,
        214,
        109,
        43,
        48,
        160,
        91,
        119,
        217,
        114,
        105,
        135,
        98,
        144,
        109,
        37,
        49,
        42,
        91,
        129,
        44,
        247,
        7,
        129,
        129,
        157,
        247,
        14,
        123,
        136,
        189,
        210,
        78,
        123,
        140,
        81,
        110,
        210,
        116,
        69,
        106,
        24,
        130,
        77,
        126,
        36,
        63,
        242,
        163,
        118,
        16,
        236,
        48,
        186,
        8,
        58,
        134,
        209,
        102,
        80,
        153,
        24,
        157,
        29,
        64,
        127,
        219,
        65,
        59,
        124,
        49,
        206,
        61,
        30,
        92,
        171,
        224,
        187,
        75,
        95,
        163,
        75,
        240,
        140,
        82,
        89,
        226,
        193,
        213,
        77,
        6,
        209,
        31,
        205,
        76,
        169,
        140,
        146,
        156,
        160,
        185,
        29,
        222,
        127,
        0,
        189,
        50,
        110,
        192,
        224,
        239,
        109,
        3,
        26,
        36,
        167,
        194,
        212,
        149,
        170,
        234,
        138,
        42,
        33,
        75,
        153,
        19,
        129,
        73,
        40,
        100,
        208,
        153,
        80,
        111,
        150,
        143,
        91,
        11,
        90,
        100,
        112,
        219,
        246,
        235,
        198,
        119,
        23,
        115,
        80,
        174,
        86,
        68,
        21,
        21,
        203,
        171,
        178,
        48,
        210,
        54,
        132,
        86,
        5,
        214,
        192,
        32,
        164,
        215,
        154,
        190,
        182,
        71,
        28,
        49,
        164,
        50,
        43,
        4,
        72,
        107,
        155,
        149,
        168,
        26,
        107,
        16,
        215,
        180,
        67,
        76,
        56,
        208,
        84,
        42,
        36,
        220,
        118,
        248,
        89,
        242,
        133,
        228,
        82,
        8,
        206,
        138,
        92,
        169,
        156,
        163,
        3,
        81,
        33,
        46,
        103,
        47,
        48,
        194,
        242,
        51,
        146,
        159,
        81,
        181,
        164,
        76,
        51,
        169,
        41,
        91,
        96,
        123,
        215,
        152,
        206,
        246,
        205,
        105,
        80,
        161,
        185,
        92,
        20,
        5,
        79,
        160,
        173,
        9,
        166,
        3,
        189,
        155,
        230,
        180,
        49,
        213,
        198,
        202,
        38,
        172,
        109,
        252,
        236,
        251,
        33,
        218,
        112,
        241,
        60,
        18,
        83,
        209,
        154,
        75,
        102,
        20,
        169,
        105,
        145,
        35,
        41,
        158,
        186,
        235,
        236,
        48,
        152,
        117,
        42,
        3,
        79,
        211,
        127,
        183,
        111,
        23,
        179,
        30,
        6,
        250,
        118,
        207,
        189,
        153,
        25,
        158,
        251,
        174,
        27,
        123,
        236,
        255,
        202,
        143,
        113,
        3,
        137,
        194,
        58,
        153,
        207,
        175,
        46,
        83,
        86,
        151,
        254,
        118,
        40,
        123,
        125,
        251,
        117,
        99,
        182,
        243,
        132,
        18,
        247,
        136,
        252,
        250,
        189,
        133,
        76,
        216,
        131,
        179,
        166,
        177,
        225,
        211,
        147,
        46,
        175,
        8,
        156,
        22,
        231,
        222,
        7,
        215,
        164,
        30,
        113,
        47,
        14,
        108,
        254,
        252,
        250,
        241,
        247,
        231,
        111,
        60,
        211,
        128,
        252,
        189,
        13,
        160,
        89,
        201,
        153,
        18,
        69,
        142,
        100,
        76,
        109,
        207,
        125,
        131,
        56,
        53,
        189,
        26,
        213,
        139,
        130,
        111,
        207,
        203,
        157,
        218,
        66,
        103,
        239,
        172,
        3,
        141,
        233,
        235,
        57,
        53,
        42,
        70,
        240,
        165,
        71,
        129,
        224,
        206,
        184,
        49,
        121,
        4,
        193,
        231,
        63,
        185,
        236,
        195,
        182,
        13,
        182,
        121,
        41,
        116,
        185,
        36,
        60,
        9,
        141,
        219,
        32,
        11,
        113,
        13,
        83,
        90,
        221,
        135,
        101,
        240,
        126,
        139,
        183,
        134,
        150,
        115,
        146,
        180,
        252,
        31,
        125,
        219,
        167,
        208,
        253,
        5,
        232,
        199,
        238,
        25,
        196,
        36,
        225,
        101,
        57,
        221,
        76,
        255,
        0,
        85,
        168,
        136,
        227,
        126,
        3,
        0,
        0
    ]
}

期待找到一个可以解码二维矩阵的解决方案