{
  "point_count": 1274651,
  "source_db_signature": [
    [
      "PHerc0343P_20260304131111_surface_m7_L2_th0.2.dbm",
      16707584,
      1785309288627572893
    ]
  ],
  "track_count": 38448,
  "version": 1
}