Trying to run a function on Ender Dragon death

Question

I'm somewhat new to coding, I'm trying to have the Ender Dragon load an mcstructure on death. You can see my current code attempt below; any thoughts on how to make this work?

    "format_version": "1.10.0",
    "animation_controllers": {
        "controller.animation.death": {
        "initial_state":"default",
            "states": {
                "default": {
                    "transitions": [
                        {
                            "dead": "ender_dragon.q.is_alive"
                        }
                    ]
                },
                "dead": {
                    "on_entry": ["/structure load dragon_drops ~ ~ ~"]
                }
            }
        }
    }
}