code: def prepare_node(data):
      if not data:
          return None, {}
      if isinstance(data, str):
          return data, {}
      if all(field in data for field in ("Node", "Service", "Checks")):
          return data["Node"]["Node"], data["Node"]
      result = {}
      if "ID" in data:
          result["Node"] = data["ID"]
      for k in ("Datacenter", "Node", "Address",
                "TaggedAddresses", "Service",
                "Check", "Checks"):
          if k in data:
              result[k] = data[k]
      if list(result) == ["Node"]:
          return result["Node"], {}
      return result.get("Node"), result