Model representation of Entries Endpoint for Nightscout. For a given type other properties not relevant would be nil.

entry.json

[
  {
    "device": "xDrip",
    "type": "sgv",
    "dateString": "string",
    "date": 0,
    "sgv": {
      "direction": "string",
      "filtered": 0,
      "unfiltered": 0,
      "noise": 0,
      "rssi": 0,
      "sgv-mgdl": 0,
      "sgv-mmol": 0,
      "raw-sgv-mgdl": 0,
      "raw-sgv-mmol": 0,
      "delta": -1.1
    },
    "cal": {},
    "mbg": {}
  },
  {
    "device": "xDrip",
    "type": "cal",
    "dateString": "string",
    "date": 0,
    "sgv": {},
    "cal": {
      "slope": 0,
      "scale": 0,
      "intercept": 0
    },
    "mbg": {}
  },
  {
    "device": "xDrip",
    "type": "mbg",
    "dateString": "string",
    "date": 0,
    "sgv": {},
    "cal": {},
    "mbg": {
      "mbg": 0
    }
  }
]