Problem:
We use different operators in JSONs which are then used for comparison. If we add regular operators to json string, e.g. Len, HasPrefix, etc, the JSON becomes invalid and formatters, validators cannot parse the string.

Proposal:
Add support for quotation marks for operators in JSON strings, similarly to currently it is being used for shortcut operators "$^NotEmpty". Ideally it could look similar "$^Len(10)"