InsightIDR Investigation API

I am working on a PowerShell script that will allow my Security Analysts to update investigations via the script, which will make an API call to update the investigation. The trouble I am having is that it appears that a Comment cannot be added via the InsightIDR API ( InsightIDR API Documentation (rapid7.com)). Is there any way, while making a call to the https://[region].api.insight.rapid7.com/idr/v2/investigations/{id} endpoint that a comment can be added to the investigation with the payload?

The comments API is a v1 endpoint, see here InsightIDR API Documentation

David