effect node by you rules json

effect node by you rules json.js

{
  "rules": {
    ".read": true,
    ".write": false,

    //
    //
    "profile": {
      "$owner_user_id": {
        ".read": "true",
          "canvas": {
          ".read": "true",
          "$canvasID": {
          	".read": "true",
            ".write": "auth !== null && auth.uid === $owner_user_id",
            "shareACL": {
              ".write": "auth !== null && auth.uid === $owner_user_id"
            },
            "ownerACL": {
              ".write": "auth !== null && auth.uid === $owner_user_id"
            }
          }
        },
          "layout": {
          ".read": "true",
          "$canvasID": {
            ".write": "auth !== null && auth.uid === $owner_user_id",
            "shareACL": {
              ".write": "auth !== null && auth.uid === $owner_user_id"
            },
            "ownerACL": {
              ".write": "auth !== null && auth.uid === $owner_user_id"
            }
          }
        }
      }
    },

    "canvas": {
      "$canvasID": {
        "$ownerID": {
          ".read": true,
          ".write": "auth !== null && auth.uid === $ownerID || auth !== null && root.child('profile').child($ownerID).child('canvas').child($canvasID).child('shareACL').hasChild(auth.uid)"
        }
      }
    }
  }
}