mongo-python-driver/test/client-side-encryption/etc/data/lookup/schema-qe.json

{
    "escCollection": "enxcol_.qe.esc",
    "ecocCollection": "enxcol_.qe.ecoc",
    "fields": [
        {
            "keyId": {
                "$binary": {
                    "base64": "EjRWeBI0mHYSNBI0VniQEg==",
                    "subType": "04"
                }
            },
            "path": "qe",
            "bsonType": "string",
            "queries": {
                "queryType": "equality",
                "contention": 0
            }
        }
    ]
}