  Higher spin gravities do not have a low energy limit where higher-spin fields
decouple from gravity. Nevertheless, it is possible to construct fine-tuned
exact solutions that activate low-spin fields without sourcing the higher-spin
fields. We show that BPST (Belavin-Polyakov-Schwartz-Tyupkin) instanton is an
exact solution of Chiral Higher Spin Gravity, i.e. it is also a solution of the
holographic dual of Chern-Simons matter theories. This gives an example of a
low-spin solution. The instanton sources the opposite helicity spin-one field
and a scalar field. We derive an Effective Field Theory that describes the
coupling between an instanton and the other two fields, whose action starts
with the Chalmers-Siegel action and has certain higher derivative couplings.
