Datasets to power the Market Depth chart.
Both bids and asks are lists of 2-item tuples: [price, volume]

Additionally there are aggregate values provided for both sides of the book
and both quote and base currencies (in that order) under the totals key:

totals = [
[amount of quote currency in bids, amount of base currency in bids],
[amount of quote currency in asks, amount of base currency in asks],
]

A nice article explaining how the Depth Chart works:
https://hackernoon.com/depth-chart-and-its-significance-in-trading-bdbfbbd23d33

GET /api/public/market/ogc-usdt/depth/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Cache-Control: public, s-maxage=1
Content-Type: application/json
Vary: Accept

{
    "bids": [
        [
            "30",
            "0.0332"
        ]
    ],
    "asks": [
        [
            "48.195554",
            "0.830333"
        ],
        [
            "48.196036",
            "3.830333"
        ],
        [
            "48.197",
            "5.650333"
        ],
        [
            "48.198064",
            "5.687471"
        ],
        [
            "48.599522",
            "6.407645"
        ],
        [
            "50",
            "7.940058"
        ],
        [
            "50.012416",
            "12.586211"
        ],
        [
            "51",
            "13.586211"
        ],
        [
            "53",
            "14.586211"
        ],
        [
            "53.082119",
            "19.207745"
        ],
        [
            "55",
            "19.211495"
        ],
        [
            "68.5",
            "20.211495"
        ],
        [
            "68.591229",
            "68.111031"
        ],
        [
            "73.679998",
            "68.311031"
        ],
        [
            "75",
            "69.311031"
        ],
        [
            "80.26163",
            "78.219138"
        ],
        [
            "100",
            "79.219138"
        ],
        [
            "105",
            "80.219138"
        ],
        [
            "120",
            "81.116227"
        ],
        [
            "120.5",
            "81.916227"
        ],
        [
            "130",
            "82.916227"
        ],
        [
            "147.5",
            "85.916227"
        ],
        [
            "147.7",
            "90.916227"
        ],
        [
            "149",
            "90.926227"
        ],
        [
            "150",
            "100.926227"
        ],
        [
            "250",
            "105.926227"
        ],
        [
            "1000",
            "155.926227"
        ]
    ],
    "totals": [
        [
            "0.996",
            "0.0332"
        ],
        [
            "59597.872065",
            "155.926227"
        ]
    ]
}