[{"key":"07315000","name":"Mainz, Stadt","type":"Kreisfreie Stadt","postalCode":"55116","multiplePostalCodes":true,"district":{"key":"07315","name":"Mainz, kreisfreie Stadt","type":"Kreisfreie Stadt"},"governmentRegion":{"key":"073","name":"früher: Reg.-Bez. Rheinhessen-Pfalz"},"federalState":{"key":"07","name":"Rheinland-Pfalz"}}]