{
  "request": {
    "method": "PUT",
    "url": "https://brewpage.app/api/kv/myapp/kvstore123/feature-flag",
    "headers": {
      "User-Agent": "MyBot/2.1",
      "Content-Type": "application/json",
      "X-Owner-Token": "owner_a9b8c7d6e5f4a3b2"
    },
    "body": {
      "value": {"enabled": true, "rolloutPercent": 25}
    }
  },
  "response": {
    "status": 200,
    "body": {
      "namespace": "myapp",
      "id": "kvstore123",
      "key": "feature-flag",
      "updatedAt": "2026-05-16T12:34:56Z"
    }
  }
}