The defendants who have been personally served with the summons and a copy of the complaint shall set forth in their answers, fully and particularly, the nature and extent of their interest in the property, and if such defendants claim a lien upon the property by mortgage, judgment or otherwise, they shall state its amount and date, the amount remaining due thereon, whether the amount has been secured in any other way or not and, if secured, the extent and nature of the security, or they shall be deemed to have waived their rights to the lien.