Any assignment of a mortgage and any assignment of the beneficial interest under a deed of trust may be recorded, and from the time the same is filed for record operates as constructive notice of the contents thereof to all persons; and any instrument by which any mortgage or deed of trust of, lien upon or interest in real property, (or by which any mortgage of, lien upon or interest in personal property a document evidencing or creating which is required or permitted by law to be recorded), is subordinated or waived as to priority may be recorded, and from the time the same is filed for record operates as constructive notice of the contents thereof, to all

persons.