Knowledge Advanced REST API: error retrieving object

Summary

I try to get a rating for a content id, but it cannot be found though I verified it exists

Content

Hi,

Using the Knowledge Advanced REST API via Postman, I'm trying to see if I can get the rating belonging to an article. This is my request (after having authorized the API User and thereafter the Console and Web user):
 

Url:
GET https://{{hostname}}-irs.{{server}}/km/api/{{apiversion}}/content/{{answerid}}/ratings

Headers:

key: kmauthtoken
value: {"siteName":"{{sitename}}","interfaceId":"{{interfaceId}}","localeId":"{{localeId}}","knowledgeInteractionId":"{{knowledgeInteractionId}}","integrationUserToken":"{{integrationUserToken}}"}

key: answerid
value: {{answerid}}

Pre-request Script:
postman.setEnvironmentVariable("answerid","1001425");

And this is the response I get: