mutation ticketExternalReferencesIssueTrackerItemAdd(
  $issueTrackerLink: UriHttpString!
  $issueTrackerType: EnumTicketExternalReferencesIssueTrackerType!
  $ticketId: ID
) {
  ticketExternalReferencesIssueTrackerItemAdd(
    issueTrackerLink: $issueTrackerLink
    issueTrackerType: $issueTrackerType
    ticketId: $ticketId
  ) {
    issueTrackerItem {
      assignees
      issueId
      labels {
        color
        textColor
        title
      }
      milestone
      state
      title
      url
    }
    errors {
      ...errors
    }
  }
}