var data = JSON.parse(value);

data.forEach(function(instance) {
    if (instance["{#INSTANCE}"] === '_total') {
        instance["{#INF.STORE}"] = 'Information Store';
    }
    else {
        instance["{#INF.STORE}"] = 'Information Store - ' + instance["{#INSTANCE}"];
    }
})

return JSON.stringify(data);