Python で配列定義が正しくない JSON データを正しく解析するにはどうすればよいですか?

{
    "maps": [
        {
            "id": "blabla",
            "iscategorical": "0"
        },
        {
            "id": "blabla",
            "iscategorical": "0"
        }
    ],
    "masks": {
        "id": "valore"
    },
    "om_points": "value",
    "parameters": {
        "id": "valore"
    }
}

import json
from pprint import pprint

with open('data.json') as f:
    data = json.load(f)

pprint(data)

data["maps"][0]["id"]  # Retrieves the "id" value of the first map
data["masks"]["id"]  # Retrieves the "id" value of the masks object
data["om_points"]  # Retrieves the "om_points" value