Expand Record field using OData query

Hi everyone,

I'm building a report that uses OData as the data source.

As this data source has a lot of information, I'm creating a filter directly in the query, using $select=id,change
However, the change column is a Record type column, and has a bunch of fields inside it. I want to extract only the operatorId column inside the change Record. How to do this directly via OData query?

I've researched in different forums and everything I found and tested didn't work.

The problem is my lack of knowledge in that language.

This is the best documentation I could find but even it did not help me to do what I need:

http://docs.oasis-open.org/odata/odata/v4.01/cs01/part2-url-conventions/odata-v4.01-cs01-part2-url-conventions.html#_Toc505773297

This is what I've tried so far:
$select=id,change&$expand=change($select=operatorId)

$select=id&$expand=change($select=operatorId)

$select=id,change&$expand=change/operatorId

$select=id,change/operatorId