It shall be the duty of the prothonotary of each county, upon receiving from the Surveyor General¹ any such list or calculation of amounts due the Commonwealth for purchase money, interest and fees, to provide a suitable docket, with index, in the form of the lien dockets now in use in the several counties of this Commonwealth, to be styled “lien docket of unpatented lands,” and enter therein the amount so found to be due, which sum shall remain a lien upon such tract or tracts, until paid; and that a fee of fifty cents be paid to the prothonotary of each description so entered, and that he be allowed the same fees on the liens entered as are now allowed on judgments entered by warrant of attorney in the courts of common pleas.