{
  "id": "string",
  "day": "string",
  "end_datetime": "string",
  "heart_rate": {
    "interval": 0.0,
    "items": [],
    "timestamp": "string"
  },
  "heart_rate_variability": {
    "interval": 0.0,
    "items": [],
    "timestamp": "string"
  },
  "mood": "bad",
  "motion_count": {
    "interval": 0.0,
    "items": [],
    "timestamp": "string"
  },
  "start_datetime": "string",
  "type": "breathing"
}