// Withings
{
    "createdAt": "2019-07-20T19:45:55.451Z",
    "humanId": "1c09z451e631a932f10bbdb0a7c83cdd",
    "id": "8d3363723s6b110100d61e78",
    "source": "54dc427aaa6b4cb7d6202f04", //withings
    "sourceData": {},
    "timestamp": "2019-07-20T16:13:04.000Z",
    "tzOffset": "-05:00",
    "unit": "bpm",
    "updatedAt": "2019-07-20T19:45:55.451Z",
    "userId": "5917155fd5c2f801004a8c45",
    "value": 66
}

// Healthkit
{
    "createdAt": "2020-08-22T02:03:36.326Z",
    "humanId": "b552710122sf878d6297a564k257a502",
    "id": "5f431ff81f6dd8a68b813d87",
    "source": "5541a9678e7192cb4fb34fed", //healthkit
    "sourceData": {
        "originalSource": "com.apple.health",
        "sampleType": "HKQuantityTypeIdentifierHeartRate"
    },
    "timestamp": "2020-08-24T01:17:35.674Z",
    "tzOffset": "-07:00",
    "unit": "bpm",
    "updatedAt": "2020-08-22T02:03:36.326Z",
    "userId": "9z16351b5a800f7cf6373agf",
    "value": 80
}

// ihealth
{
    "createdAt": "2021-02-14T19:26:54.978Z",
    "humanId": "10df1f228d232b0ad55addcae062b2c8",
    "id": "6023797eaee6109d0d36be47",
    "source": "54dc427aaa6b4cb7d6202f03", //ihealth
    "sourceData": {},
    "timestamp": "2021-02-14T19:26:50.000Z",
    "tzOffset": "+01:00",
    "unit": "bpm",
    "updatedAt": "2021-02-14T19:27:25.088Z",
    "userId": "55z7504ca2058401005ab8ad",
    "value": 94
}

// Runkeeper (deprecated source)
{
    "createdAt": "2019-07-20T05:08:51.441Z",
    "humanId": "7503ff2bf400067237883e164e13ae7f",
    "id": "5d32a1e3343e9101006e7f12",
    "source": "54dc427aaa6b4cb7d6202f07", //runkeeper
    "sourceData": {},
    "timestamp": "2019-07-19T03:57:51.000Z",
    "tzOffset": "+02:00",
    "unit": "bpm",
    "updatedAt": "2019-07-20T05:08:51.441Z",
    "userId": "578b8be5e2dfd10100341142",
    "value": 74
}