hoverEvent not working

Tellraw command:
/tellraw @a {"text":"", "extra":[{"text":"hover over this", "color":"green", "hoverEvent":{"action":"show_item", "value":"{id:1,Damage:0,Count:1,tag:{display:{Name:\"Line 1\", Lore:[\"Line 2\", \"Line 3\"]}}}"}}]}

Give command (Doesn't work):
/give @a minecraft:written_book 1 0 {title:"",author:"",pages:["{text:\"Hover.\",hoverEvent:{action:show_item,value:\"{id:1,Damage:0,Count:1,tag:{display:{Name:\"Line 1\", Lore:[\"Line 2\", \"Line 3\"]}}}"}}"]}