curl --request POST \
  --url https://api.ubicloud.com/project/{project_id}/location/{location}/firewall/{firewall_reference}/detach-subnet \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "private_subnet_id": "<string>"
}
'

{
  "description": "<string>",
  "firewall_rules": [
    {
      "cidr": "<string>",
      "id": "fraz0q3vbrpa7pkg7zbmah9csn",
      "port_range": "<string>",
      "description": "<string>"
    }
  ],
  "id": "fwfg7td83em22qfw9pq5xyfqb7",
  "location": "<string>",
  "name": "<string>",
  "private_subnets": [
    "<string>"
  ]
}