{"subjectId":"gauge-fr-h4030210","seriesUrlPattern":"/api/v1/series/{metricId}--{subjectId}.json","seriesCount":1,"observationCount":715,"series":[{"metricId":"river-flow-monthly-mean","subjectId":"gauge-fr-h4030210","unit":"m³/s","periodKind":"month","count":715,"from":"1965-01-01","to":"2026-09-01","sourceId":"fr-hubeau-hydrometrie"}]}