GET /api/detection_engine/rules?id=e9c05e3b-ca79-4d61-bd9a-44995b8f762d
{
    "id": "e9c05e3b-ca79-4d61-bd9a-44995b8f762d",
    "required_fields": [
        {
            "name": "event.action",
            "type": "keyword",
            "ecs": true
        },
       // ...
    ],
  //... other fields
}

PATCH /api/detection_engine/rules
{
    "id": "e9c05e3b-ca79-4d61-bd9a-44995b8f762d",
    "description": "Slightly updated description"
}

GET /api/detection_engine/rules?id=e9c05e3b-ca79-4d61-bd9a-44995b8f762d
{
    "id": "e9c05e3b-ca79-4d61-bd9a-44995b8f762d",
    "required_fields": [],
  //... other fields
}