curl --request POST \
  --url https://production.api.onvy.health/users/{user_id}/activities \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "type": "workout",
  "start_datetime": "2023-11-07T05:31:56Z",
  "end_datetime": "2023-11-07T05:31:56Z",
  "data_source": "<string>",
  "duration_seconds": 1,
  "type_name": "<string>",
  "tss": 123,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "used_ftp": 123,
  "guessed_ftp": 123,
  "is_breakthrough_ftp": true,
  "zone_power": "<string>",
  "normalized_power": 123,
  "variability_index": 123,
  "intensity_factor": 123,
  "tss_power": 123,
  "average_hr": 123,
  "average_power": 123,
  "zone_hr": "<string>",
  "used_lthr": 123,
  "guessed_lthr": 123,
  "guessed_mhr": 123,
  "is_breakthrough_lthr": true,
  "tss_hr": 123,
  "peak_duration_hr": 123,
  "cardio_duration_hr": 123,
  "fatburn_duration_hr": 123,
  "light_duration_hr": 123,
  "hr_series": "<string>",
  "hr_series_sampling_rate": "<string>",
  "peak_threshold_hr": 123,
  "cardio_threshold_hr": 123,
  "fatburn_threshold_hr": 123,
  "calories": 123,
  "max_hr": 123,
  "hr_zone_durations_seconds": [
    123
  ],
  "hr_zone_thresholds": [
    123
  ],
  "power_zone_durations_seconds": [
    123
  ],
  "power_zone_thresholds": [
    123
  ],
  "activity_score_before": 123,
  "activity_score_after": 123,
  "group_id": 123,
  "selected": true
}
'

{
  "project_id": "<string>",
  "user_id": "<string>",
  "type": "workout",
  "start_datetime": "2023-11-07T05:31:56Z",
  "end_datetime": "2023-11-07T05:31:56Z",
  "data_source": "<string>",
  "duration_seconds": 1,
  "type_name": "<string>",
  "tss": 123,
  "id": "<string>",
  "used_ftp": 123,
  "guessed_ftp": 123,
  "is_breakthrough_ftp": true,
  "zone_power": "<string>",
  "normalized_power": 123,
  "variability_index": 123,
  "intensity_factor": 123,
  "tss_power": 123,
  "average_hr": 123,
  "average_power": 123,
  "zone_hr": "<string>",
  "used_lthr": 123,
  "guessed_lthr": 123,
  "guessed_mhr": 123,
  "is_breakthrough_lthr": true,
  "tss_hr": 123,
  "peak_duration_hr": 123,
  "cardio_duration_hr": 123,
  "fatburn_duration_hr": 123,
  "light_duration_hr": 123,
  "hr_series": "<string>",
  "hr_series_sampling_rate": "<string>",
  "peak_threshold_hr": 123,
  "cardio_threshold_hr": 123,
  "fatburn_threshold_hr": 123,
  "calories": 123,
  "max_hr": 123,
  "hr_zone_durations_seconds": [
    123
  ],
  "hr_zone_thresholds": [
    123
  ],
  "power_zone_durations_seconds": [
    123
  ],
  "power_zone_thresholds": [
    123
  ],
  "activity_score_before": 123,
  "activity_score_after": 123,
  "group_id": 123,
  "selected": true,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}