How do I escape "$" signs when templating happens?

[dakusui]

I have a following key-value.

{
  "hello": "HELLO",
  "world": "WORLD",
  "value": "eval: $(ref .hello) $(echo $(ref .world))"
}

The intention is to render following element.

 "value": "HELLO $(echo WORLD)"

However, jq-front renders this into :

 "value": "HELLO WORLD"

Because it just considers the given data as a nested command substitution.
How can I define the element to get the desired string?

[dakusui]

Following JSON file results in the desired output.

{
  "hello": "HELLO",
  "world": "WORLD",
  "value": "eval: $(ref .hello) '$(echo '$(ref .world)')'"
}

[dakusui]

Please see also Issue #132