typeof [object Object] is string

I need to upload several images along with some other data (strings, numbers, booleans and objects). However, the objects are parsed as strings "[object Object], [object Object]".
The rest of the fields and the image upload work well, but how do I retrieve the objects as objects? Does Multer only return strings?

```javascript
app.post('/adverts', requireAuth, upload.array('images', 15), Adverts.create);
```

index.js:
```javascript
app.use(bodyParser.json());
```