@NotificationMessageMapping handler cannot deserialize Chinese characters

[jpthompson23]

Describe the bug
I publish a notification to SNS that contains a JSON object with Chinese characters in some of the fields, such as:
{ "documentTitle": "口廿竹十火 - new" }

And the NotificationMessageMapping handler deserializes this as:
{ "documentTitle": "????? - new" }

Sample

    // try this with an SNS message that contains Chinese characters:
    @NotificationMessageMapping
    public void handleNotification(@NotificationMessage JsonNode message, @NotificationSubject String subject) {
        System.out.println(message);
    }