After a brief incursion in journalism, he worked as a literature and Spanish professor but for political reasons (in addition to his membership in the Unión Cívica Radical) he was expelled from his professorship and decided to dedicate himself to the arts.

They manifested to “reconquer the political Sunday from our own land” since it was considered that the country was still in a colonial situation.

[1] In 1934 Manzi founded Micrófono ("Microphone") magazine which covered subjects related to radio telephony, Argentine movies and film making.

He wrote the screenplay for Nobleza Gaucha in 1937 in collaboration with Hugo Mac Dougall, and a new version of the silent movie of 1915, Huella ("Footprint") (1940), for which they received second prize from Buenos Aires City Hall.

[2] In 1940 Manzi started what would be a long collaboration with Ulyses Petit de Murat, writing the screenplay for Con el dedo en el gatillo ("Finger on the trigger") (1940) Fortín alto ("High Fort") (1940), and The Gaucho War (1942).