PushNotification with timeout

Hi, I can not figure out the format for specifying expire_after_seconds in options. I always get: Invalid json format on options parameter: 745: unexpected token at '{expire_after_seconds: "86400"}'.

In the docs it says: "use options={'expire_after_seconds':86400}" but I need to use a ":"-sign and not a "="-sign and the rest does not work either. And what is a datatype hash which I should use?

var payload='{badge : "+1",alert:"'+text+'"}';
    var options='{expire_after_seconds: "86400"}';
    ACS.PushNotifications.notify({
            channel: 'game',
            to_ids: ids,
            payload : payload,
            session_id: server_session_id,
            options:options,
        }, function (e) {
            if (e.success) {
                console.log('Success');
            } else {
                console.log('Error:\n' +
                    ((e.error && e.message) || JSON.stringify(e)));
            }
    });