Section 84. Assignment of lien

A lien, a notice of which has been filed
  pursuant to the provisions of this article, may be assigned by a written
  instrument duly acknowledged and filed  in  the  same  place  where  the
  notice of the lien was filed. The assignment shall specify the debt upon
  which  the lien is founded, the date of the filing of the notice thereof
  and the assignee. Such assignment and the name of the assignee shall  be
  entered by the clerk opposite the original entry of such lien, and after
  the  filing  of  such  assignment,  but  not otherwise, the assignee may
  enforce the lien in like manner as the assignor could have done.