List custom tabs

{
  "customTabs": [
    {
      "id": "tab-123",
      "slug": "vendor-assurance",
      "title": "Vendor Assurance",
      "order": 1,
      "enabled": true,
      "access_level": "public",
      "content": {
        "layers": []
      },
      "date_created": "2024-05-12T10:11:12Z",
      "date_updated": "2024-05-12T10:11:12Z"
    }
  ]
}