I've just changed the way I was doing the things..
I changed from getting Tiles data from a json and I created my own tiles.. and it worked!!
var Tile1 = new sap.m.StandardTile({title:"Tile 1"});
oContainer.addTile(Tile1);
var Tile2 = new sap.m.StandardTile({title:"Tile 2"});
oContainer.addTile(Tile2);