Etch, thank you for finding the music for the song, at least I now know that it 'is' actually a song.
German as a language is something that I will never understand.
I copied and pasted the text on the page that you linked to but it still doesn't make any sense.
I will probably sell the postcard with some vague description.
The document is entitled "Gstanzln & Schnaderhüpfln (funny quatrains from the Alpine region)". There is Wikipedia article for 'Gstanzl', which says that "Depending on the region, a Gstanzl may also be called Schnadderhüpfl":
https://en.wikipedia.org/wiki/Gstanzl