Cannot access not published changes - Content Delivery API

Hello everyone!

I'm trying to fetch new content after upgrading EPiServer packages.

I'm subscribing to 'beta/contentSaved' event and fetching content using contentLink property from the response

/api/episerver/v2.0/content/1701_3257?expand=*&epieditmode=True

but it failes with '404 Content not found' error.

Is there any way to fetch content before it's published in new version?