SAYCE Is a collective management society in Ecuador, whose main objective is to protect and manage economic rights resulting from the use of musical works by national and foreign authors. They constitute a legal entity of private law, non-profit, capable of exercising rights, contracting civil obligations and to be represented judicially and extrajudicially at the national and international level. As an author society, they are part of the International Confederation of Societies of Authors and Composers, CISAC, world body for the protection of copyright and other similar regional organizations.
Music Publishing is the business of protecting and promoting song copyrights and collecting the royalties that these copyrights generate. Think of a song as intellectual property (it's an original piece of art!), and music publishing as the business that makes sure that songwriters get paid a fair compensation when their intellectual property is used by companies. Those companies could be record labels (mechanical royalties), radio stations, bars, and restaurants (performance royalties), or film studios and advertising agencies (sync license fees), and many more.