  We present time-resolved spectroscopy of transits of the super-Earth 55 Cnc e
using HARPS-N observations. We devised an empirical correction for the "color
effect" affecting the radial velocity residuals from the Keplerian fit, which
significantly improves their dispersion with respect to the HARPS-N pipeline
standard data-reduction. Using our correction, we were able to detect the
smallest Rossiter-McLaughlin anomaly amplitude of an exoplanet so far (~60
cm/s). The super-Earth 55 Cnc e is also the smallest exoplanet with a
Rossiter-McLaughlin anomaly detection. We measured the sky-projected obliquity
lambda = 72.4 (+12.7 -11.5 deg), indicating that the planet orbit is prograde,
highly misaligned and nearly polar compared to the stellar equator. The entire
55 Cancri system may have been highly tilted by the presence of a stellar
companion.
