matrix-nio/tests/data/events/receipt_invalid.json

{
    "content": {
        "$152037280074GZeOm:localhost": {
            "m.read": {
                "@bob:example.com": {
                    "ts": 1520372804619
                },
                "@alice:example.com": "\"ts\": 1520372804619"
            }
        }
    },
    "type":"m.receipt"
}