// Withings
{
    id: "54d1f018810a5ba429951b07",
    userId: "52e20cb2fff56aac62000001",
    timestamp: "2015-01-26T06:58:37.000Z",
    tzOffset: "+00:00",
    value: 99,
    unit: "SpO2(%)",
    source: "withings",
    sourceData: { },
    createdAt: "2015-02-04T10:10:32.691Z",
    updatedAt: "2015-02-04T10:10:32.691Z",
    humanId: "5dc2527186aaf9de560e5841f1a44bd6"
}

// iHealth
{
    "createdAt": "2020-07-11T17:33:34.146Z",
    "humanId": "120abb1f6d08ea64b62fe4f2622a2393",
    "id": "5f09f7ee7270be554c4a40fe",
    "source": "ihealth",
    "sourceData": {},
    "timestamp": "2020-07-11T17:33:12.000Z",
    "tzOffset": "-05:00",
    "unit": "SpO2(%)",
    "updatedAt": "2020-07-11T17:33:34.146Z",
    "userId": "52759adc8669655e51002f47",
    "value": 99
}