A comment is a statement of fact or opinion, that expresses a personal reaction or attitude on the entity object. It includes the Comment ID that is used to make reference to the particular comment throughout the system. Each Comment ID is unique and automatically generated. Comments can be made on Entities such as Articles, Blogs, CMS Pages, Wikis, Files, Videos, Ideas, Photos, Events.
Please Note Refer this wiki on how to create a new comment via REST API.
is requesting access to a wiki that you have locked: http://my.axerosolutions.com/spaces/5/communifire-documentation/wiki/view/4872/rest-api-comment-overview