Section 12. Whoever, except as provided in sections thirty-two to fifty, inclusive, of chapter one hundred and forty-seven, engages in or gives or promotes a public boxing match or sparring exhibition, or engages in a private boxing match or sparring exhibition, for which the contestants have received or have been promised any pecuniary reward, remuneration or consideration whatsoever, directly or indirectly, shall be punished by a fine of not more than two hundred dollars or by imprisonment for not more than three months, or both.