curl --request POST \
  --url http://localhost:3001/api/admin/segments/manual-segment/update \
  --header 'Content-Type: application/json' \
  --data '{
  "workspaceId": "<string>",
  "segmentId": "<string>",
  "userIds": [
    "<string>"
  ],
  "append": true,
  "sync": true
}'