Sort sub-data by second field

[Roberto Maestre]

Hi!
I have this data :

(1,{(1,3),(2,4),(3,2),(4,1)})

so ... can i order the second column by the second field ? .. getting this
result:

(1,{(2,4),(1,3),(3,2),(4,1)})

Thank you in advanced.
Best regards.