curl --request GET \
  --url https://api.ubicloud.com/project/{project_id}/private-subnet \
  --header 'Authorization: Bearer <token>'

{
  "count": 123,
  "items": [
    {
      "firewalls": [
        {
          "description": "<string>",
          "firewall_rules": [
            {
              "cidr": "<string>",
              "id": "fraz0q3vbrpa7pkg7zbmah9csn",
              "port_range": "<string>",
              "description": "<string>"
            }
          ],
          "id": "fwfg7td83em22qfw9pq5xyfqb7",
          "location": "<string>",
          "name": "<string>"
        }
      ],
      "id": "ps3dngttwvje2kmr2sn8x12x4r",
      "location": "<string>",
      "name": "<string>",
      "net4": "<string>",
      "net6": "<string>",
      "nics": [
        {
          "id": "<string>",
          "name": "<string>",
          "private_ipv4": "127.0.0.1",
          "private_ipv6": "2606:4700:3108::ac42:2835",
          "vm_name": "<string>"
        }
      ],
      "state": "<string>"
    }
  ]
}