{
    "event_type":"instance.live_migration_rollback.start",
    "payload":{
        "$ref":"common_payloads/InstanceActionPayload.json#",
        "nova_object.data":{
            "action_initiator_user": "admin",
            "task_state": "migrating"
        }
    },
    "priority":"INFO",
    "publisher_id":"nova-compute:compute"
}