curl --request GET \
  --url https://statsigapi.net/console/v1/segments/{id}/id_list \
  --header 'STATSIG-API-KEY: <api-key>'

{
  "message": "Segments listed successfully.",
  "data": {
    "name": "small_id_list",
    "count": 3,
    "ids": [
      "1, 2, 3"
    ]
  }
}