New to extjs what would be store definition for json string given

Hi, it would be a great help if someone can tell what would be store definition for following json string. Sorry if it is too simple this is my first day with extjs



object

{

[ {

"code" : "0",

"msg" : "0",

"GridData" : [ {

"DAY" : "Apr 5 2014",

"ID" : "2310",

"NAME" : "xyg",

"VALUE" : "0.0",

"USERID" : " "

}, {

"DAY" : "Apr 5 2014",

"ID" : "2312",

"NAME" : "xyz",

"VALUE" : "0.0",

"USERID" : " "

}, {

"DAY" : "Apr 5 2014",

"ID" : "2434",

"NAME" : "abc",

"VALUE" : "0.0",

"USERID" : " "

}, {

"DAY" : "Apr 5 2014",

"ID" : "2435",

"NAME" : "Aabc",

"VALUE" : "0.0",

"USERID" : " "

} ]

} ]

};