It was the title theme of the British secret agent TV series, "Top
Secret", which was broadcast in the USA in 1961 and 1962. The action
took place in Argentina, thus the South American flavoured theme.

The title theme's original name was "Sucu Sucu", composed by Tarateno
Rojas and Ren Jan Van Hoogten. The English vocal version had the
title "Step Right Up (And Say You Love Me)", though it is known as
"Sucu Sucu"; the British lyricists were Ray Maxwell and Phil Belmonte.
It was played by the Laurie Johnson and his Orchestra, the same who
later also did the famous title theme for the British TV series "The
Avengers". The single became a 1961 Top 10 hit in the UK, peaking at
#9 on 30 Sep 1961.