Get current pending operational dataset

Example response

{
  "ActiveDataset": {
    "ActiveTimestamp": {
      "Seconds": 10
    },
    "NetworkKey": "08277229F21FB7342D705D3CEFDC042A",
    "NetworkName": "OpenThread-e445",
    "ExtPanId": "996D3BEE320097A3",
    "MeshLocalPrefix": "fd33:d3b9:89e3:72e4::/64",
    "PanId": 58437,
    "Channel": 21,
    "PSKc": "FD943ECA225A28979B991EFAC1218A72",
    "SecurityPolicy": {
      "RotationTime": 672,
      "ObtainNetworkKey": true,
      "NativeCommissioning": true,
      "Routers": true,
      "ExternalCommissioning": true
    },
    "ChannelMask": 134215680
  },
  "PendingTimestamp": {
    "Seconds": 10
  },
  "Delay": 30000
}