Finding value deep down in a json structure

[Svante Gustafsson Björkegren]

Hey, 

I am trying to fetch a value inside a JSON structure and I cannot get it right. Maybe this community can give me a hint how to write my smart value variables for this use case

Background: I have read up a bunch of Assets objects via the Assets REST API end point: /object/aql. The webResponse is an array of objects under the "values" tag. 

I create a branch from the {{webResponse.body.values}} smart value and call the branch variable myObject. So far so good. In each object structure in the array there is an attributes-array called attributes. In this array I need to get the value for an attribute with a specific attribute-id. 

The structure looks like this (simplified):

{
  "values": [
    {
       "id": "20",
       "attributes": [
          {
             "objectTypeAttributeId": "4839",
             "objectAttributeValues": [
                {
                   "displayValue": "Some attribute value"
                }
              ]
          },
          {
              "objectTypeAttributeId": "4853",
              "objectAttributeValues": [
                 {
                    "displayValue": "This is my value to fetch"
                 }
              ]
          }
      ]
    },
    {
       "id": "21",
       --- the next object ---

In my branch I create a variable to get the attribute array:

varAttributes --> {{myObject.attributes}}

This works fine. But I can't get down to the requested attribute-id from here. I would like to create a variable that gives me the value "This is my value to fetch", i.e. the value from the attribute with ID "4853".

I have tried a number of variants of setting a new variable to something like: {{#varAttributes}}{{.}}{{/}} and some if-clause that tests for the ID value, but I can't get it right.

Looking forward to hear back from you!

Cheers,
// Svante