accuweather output

[
  {
    "Version": 1,
    "Key": "46061_PC", #<-- what I need
    "Type": "PostalCode",
    "Rank": 41,
    "LocalizedName": "Quebec",
    "EnglishName": "Quebec",
    "PrimaryPostalCode": "G3J",
    "Region": {
      "ID": "NAM",
      "LocalizedName": "North America",
      "EnglishName": "North America"
    },
    "Country": {
      "ID": "CA",
      "LocalizedName": "Canada",
      "EnglishName": "Canada"
    },
    "AdministrativeArea": {
      "ID": "QC",
      "LocalizedName": "Quebec",
      "EnglishName": "Quebec",
      "Level": 1,
      "LocalizedType": "Province",
      "EnglishType": "Province",
      "CountryID": "CA"
    },
    "TimeZone": {
      "Code": "EDT",
      "Name": "America/Montreal",
      "GmtOffset": -4,
      "IsDaylightSaving": true,
      "NextOffsetChange": "2018-11-04T06:00:00Z"
    },
    "GeoPosition": {
      "Latitude": 46.841,
      "Longitude": -71.475,
      "Elevation": {
        "Metric": {
          "Value": 213,
          "Unit": "m",
          "UnitType": 5
        },
        "Imperial": {
          "Value": 698,
          "Unit": "ft",
          "UnitType": 0
        }
      }
    },
    "IsAlias": false,
    "ParentCity": {
      "Key": "50011",
      "LocalizedName": "Quebec",
      "EnglishName": "Quebec"
    },
    "SupplementalAdminAreas": [
      {
        "Level": 2,
        "LocalizedName": "Quebec",
        "EnglishName": "Quebec"
      }
    ],
    "DataSets": [
      "Alerts",
      "ForecastConfidence",
      "MinuteCast"
    ]
  }
]