Refactor the unstructured text into a valid JSON dictionary. The key names follow the Darwin Core Archive Standard. If a key lacks content, then insert an empty string. Fill in the following JSON structure as required: {"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}
        ijfJ$ IXORA  e india      1536300 7  E4st Khasi Hills Jy   1952-06-17 5528       Er nigricans  r. br. ex wight & arn. :    xr Gentianales  d- 1219
{"catalogNumber": "1536300", "order": "Gentianales", "family": "", "scientificName": "", "scientificNameAuthorship": "R. Br. ex Wight & Arn.", "genus": "Ixora", "subgenus": "", "specificEpithet": "nigricans", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "1952-06-17", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "India", "stateProvince": "", "county": "East Khasi Hills", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "1219", "maximumElevationInMeters": ""}