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      "nchans": 16,
      "ntimes": 58266,
      "recording_duration": 1165.32,
      "channel_type_counts": {
        "NIRSCWAMPLITUDE": 16
      }
    },
    "provenance": {
      "digested_at": "2026-06-18T06:40:34.195Z"
    },
    "signal_properties": {
      "sampling_frequency": 50.0
    }
  }
]