ReadyAPI Property transfer - value from response, count of json object/array

Hi folks,

I want to implement Property Transfer step in my readyapi project and trying to get value from GraphQL Request response and from the response I need to fetch count of particular json objects/arrays and save as property, for example:

  {
"data" : {
"Info" : {
"edges" : [
{
"node" : {
"info" : [
{
"nodeName" : "abc",
"code" : "abc",
"Devices" : [
       {
          "Id" : "abc",
          "dev" : "123",
          "mod" : "abc"
       },
      {
          "Id" : "abc",
          "dev" : "123",
          "mod" : "abc"
       },
     {
          "Id" : "abc",
          "dev" : "123",
          "mod" : "abc"
      }
   ]
 }
]
}
}
]
}
}
}
From above response I need to save count of devices which is 3 here, however 

$['data']['Info']['edges'][0]['node']['info'][0]['Devices'].length  -> This json path returns 3 when I run it in jsonpath.com  site, but it returns null when I use the same json path in readyApi

Any advice?