Whenever I make even the simplest of edits to a mob properties json file the game crashes saying its missing a function at line X.  Can someone point out my error in this code or explain why this crash is happening (I'm new to modded):

{
"_name": "EnderDragon",
"drops": [

],
"pre_stats": [

],
"stats": [
{    “function”: “modifier”,
“attribute”: “generic.maxHealth”,
   “value”: 1,
   “operator”: 1
} ]
}

As far as I can tell this should double the ender dragons max health.

The game tells me, Missing function name! at ~/Application Support/minecraft/config/MobProperties/EnderDragon.json\stats\entry_1