add item to Site Actions menu in SharePoint online Office 365 using JavaScript object model

<script>
    $(document).ready(function () {
        SP.SOD.executeFunc('sp.js', 'SP.ClientContext', AddCustomMenuAction);
    });

    function AddCustomMenuAction() {

        var clientContext = new SP.ClientContext();
        var oWeb = clientContext.get_web();

        var menuActions = oWeb.get_userCustomActions();
        var menuAction = menuActions.add();
        menuAction.set_location('Microsoft.SharePoint.StandardMenu');
        menuAction.set_sequence(101);
        menuAction.set_group('SiteActions');
        menuAction.set_title("sharepoint-data.blogspot.com");
        menuAction.set_url("http://sharepoint-data.blogspot.com/");
        menuAction.update();

        clientContext.load(menuActions);
        clientContext.executeQueryAsync(OnSuccess, OnFailure);
    }

    function OnSuccess() {
        alert('Custom menu action added in site actions');
    }

    function OnFailure() {
        alert('Fail');
    }
</script>