curl --request GET \
  --url http://localhost:3000/projects/{projectId}/envs/{envId}/flags/{flagId}/targeting-rules/{ruleId} \
  --header 'Authorization: Bearer <token>'

{
  "statusCode": 123,
  "message": "OK",
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "flag_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "environment_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "project_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "kind": "segment",
    "conditions": [
      {
        "attribute": "<string>",
        "operator": "eq",
        "value": "<string>",
        "logical_op": "AND"
      }
    ],
    "order_index": 123,
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "name": "<string>",
    "segment_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "variation_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "rollout_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "deleted_at": "2023-11-07T05:31:56Z",
    "segment_name": "<string>",
    "segment_description": "<string>",
    "segment_rules": [
      {
        "attribute": "<string>",
        "operator": "eq",
        "value": "<string>",
        "logical_op": "AND"
      }
    ],
    "segment_logical_op": "<string>",
    "segment_key": "<string>",
    "segment": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "project_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "rules": [
        {
          "type": "rule",
          "attribute": "<string>",
          "operator": "eq",
          "value": "<string>"
        }
      ],
      "logical_op": "AND",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z",
      "description": "<string>",
      "force": false,
      "key": "<string>"
    }
  }
}