How to get value of json response with key that start with a symbol? e.g. @data.etag: 12345abc

Hi, how to I get the value of a json key value pair when the key start with a symbol? e.g.

{

'@data.etag': '12345abc'

}

I understand for standard js, we are restricted to dot notation syntax. What's xano way of doing this? filter?