When I use Postman to execute a content search such as:

https://api.box.com/2.0/search?type=folder&fields=id, name, owned_by, parent&query=A&limit=10

Only some fields are displayed. When I remove one field another field which wasn’t previously returned shows up. Are there limits or constraints on the fields parameter? Also, can you specifiy fields at the next level down such as parent.id?