How to use app properties in condition expressions?

[Magic Box]

I have stored the app property like this:

test: {string: "string-value", number: 50}

And I want use the jira_expression as condition for my web-panel, for example if:

test.number == 50 show the panel, otherwise the panel is hidden.

What is the right syntax for my expression?

{
  "condition": "jira_expression",
  "params": {
    "expression": "app.properties['test']['number'] == 50"
  },
  "invert": false
}

 Thanks for help

[Yuriy Harbuziuk]

It would probably work like this

{
  "condition": "jira_expression",
  "params": {
    "expression": "app.properties['test'].number == 50"
  },
  "invert": false
}