{"subjectId":"gauge-fr-y6620003","seriesUrlPattern":"/api/v1/series/{metricId}--{subjectId}.json","seriesCount":1,"observationCount":702,"series":[{"metricId":"river-flow-monthly-mean","subjectId":"gauge-fr-y6620003","unit":"m³/s","periodKind":"month","count":702,"from":"1969-01-01","to":"2026-09-01","sourceId":"fr-hubeau-hydrometrie"}]}