{"subjectId":"gauge-fr-f4590001","seriesUrlPattern":"/api/v1/series/{metricId}--{subjectId}.json","seriesCount":1,"observationCount":765,"series":[{"metricId":"river-flow-monthly-mean","subjectId":"gauge-fr-f4590001","unit":"m³/s","periodKind":"month","count":765,"from":"1964-01-01","to":"2026-09-01","sourceId":"fr-hubeau-hydrometrie"}]}