curl --request POST \
  --url https://statsigapi.net/console/v1/experiments/{id}/overrides \
  --header 'Content-Type: application/json' \
  --header 'STATSIG-API-KEY: <api-key>' \
  --data '{
  "overrides": [
    {
      "type": "gate",
      "id": "<string>",
      "groupID": "<string>",
      "environment": "<string>"
    }
  ],
  "userIDOverrides": [
    {
      "groupID": "<string>",
      "ids": [
        "<string>"
      ],
      "environment": "<string>",
      "unitType": "<string>"
    }
  ]
}'

{
  "overrides": [
    {
      "type": "segment",
      "id": "a_segment",
      "groupID": "Control"
    },
    {
      "type": "gate",
      "id": "a_gate",
      "groupID": "Test"
    }
  ],
  "userIDOverrides": [
    {
      "groupID": "Control",
      "ids": [
        "updated_control_id_list"
      ]
    },
    {
      "groupID": "Test",
      "ids": [
        "updated_test_id_list"
      ]
    }
  ]
}