key = "id", value = 1
key = "mem/stat1", value = 10
key = "more_stats/extra_stats/stat7", value = 5

my_json =
    {
      "id": 1,
      "system_name": "System_1",
      "mem" : {
          "stat1" : 10,
          "stat2" : 1056,
          "stat3" : 10563,
      },
     "other_stats" : {
        "stat4" : 1,
        "stat5" : 2,
        "stat6" : 3,
      },
      "more_stats" : {
        "name" : "jdlfjsdlfjs",
        "os" : "fjsalfjsl",
        "error_count": 3
        "extra_stats" : {
            "stat7" : 5,
            "stat8" : 6,
        },
      }
    }

def hashkeys(json, keys = [], result = [])
      if json.is_a?(Hash)
        json.each do |key, value|
          hashkeys(value, keys + [key], result)
        end
      else
        result << keys
      end
      result.join("/")
    end

id/system_name/mem/stat1/mem/stat2/...

nested_key_value(my_json)
   some logic loop involving key and value:
      send_info(final_key, final_value)