talk/client/coral-embed-stream/src/graphql/mutations/postComment.graphql

  fragment commentView on Comment {
    id
    body
    status
    user {
      name: displayName
    }
    actions {
      type: action_type
      count
      current: current_user {
        id
        created_at
      }
    }
  }

mutation CreateComment ($asset_id: ID!, $parent_id: ID, $body: String!) {
    createComment(asset_id:$asset_id, parent_id:$parent_id, body:$body) {
        ...commentView
    }
}