Knowledge Base API - CustomAttributes

Hi,

We are looking to pull user report information from the knowledge base based on date. I've set up the payload as follows:

                {
                    "AuthorUID":"23046f29-102f-e611-570e-d8d385c1ea1e",
                    "CustomAttributes":[{
                        "Choices":[{
                            "DateModified":"2018-11-08T21:13:41.667Z"
                        }]
                    }]
                }

Weset up the process for tickets in the same manner here: https://solutions.teamdynamix.com/TDClient/Forums/Questions/Details?ID=112630 

The only issue is that within ticket API we set a value to an ID where with the knowledge base there are no ID's that I can find for choices.

After a from was created I would use a browsers developer tools to get the attributes ID, but with the knowledge base there isn't any forms/reports that give infofration about the Choice ID.

Any information would help.

Thanks,