code: public function createComment($mediaId, Comment $comment)
          {
              $parameters = [
              'query' => [],
              'body' => json_encode(['comment' => $comment], JSON_UNESCAPED_UNICODE),
              'headers' => [],
          ];
  
              $result = $this->post('v1/media/' . $mediaId . '/comments', $parameters);
              $result = new CommentResponse($result);
  
              return $result;
          }
docs: Post a comment on a media.
  
  , leave username and useremail empty to post as the user that is logged on to the API.
  
  @param  int             $mediaId the media to post the comment on
  @param  Comment         $comment The comment to post
  @return CommentResponse