Hi! In case you don't know, there's an initiative to map municipal parking with proposed tagging scheme. See https://wiki.openstreetmap.org/wiki/User:Mikedld/Portugal/Estacionamento (for general info) and https://wiki.openstreetmap.org/wiki/User:Mikedld/Portugal/Estacionamento/Lisboa (for Lisbon status). Take a look at other parking meters I've added around this area (along Avenida da Liberdade) for examples.