Expanding a column with both List and Record entries

[sdertien]

I have a series of JSON documents that I'm querying over where at a particular level the resulting data is either a list or a record.  In the case where the data is shown as a List the JSON is typically a block of nodes like this:

      "Nodes": {
        "Node": [
          {
             "OS": {
              "_name": "Windows Server 2012 R2",
              "_vendor": "Unknown",
              "_version": "6.3",
              "_arch": "Unknown"
            },
            "_id": "HOST1",
            "_cpu": "amd64"
          },
          {
            "OS": {
              "_name": "Unknown",
              "_vendor": "Unknown",
              "_version": "Unknown",
              "_arch": "Unknown"
            },
            "_id": "HOST2",
            "_cpu": "Unknown"
          }
        ]
      }

In the case where it's listed as a Record it's a single record of the same data as follows:

      "Nodes": {
        "Node": {
          "OS": {
            "_name": "Windows Server 2008 R2",
            "_vendor": "Unknown",
            "_version": "6.1",
            "_arch": "Unknown"
          },
          "_id": "HOST1",
          "_cpu": "amd64"
        }
      }

Being extremely new to working this in Power BI I'm assuming that since I'm out of options in the Desktop UI that I likely need to parse this down using M code.  I'm assuming I can test if the type of entry is a List or a Record and IF/Else the results but I can't seem to figure out the right sequence.  I've seen a few other examples but haven't been able to get those to work and get a result.  Any pointers?  Thanks!