global userdata in JSON format

How to define global userdata grid using JSON format ?

Please, try to use the following:
{“someUserData”:“someData”,
rows:[
{ id:1,
data:[
“100”,
“A Time to Kill”,
“John Grisham”,
“12.99”,
“1”,
“05/01/1998”] },

mygrid.getUserData("",“someUserData”)

sematik, Thank you