{
  "alice": {
    "alert": ["email", "sms", "slack"],
    "update": ["slack"],
    "reminder": ["email", "slack"],
    "promotion": ["email"]
  },
  "bob": {
    "alert": ["email", "sms"],
    "update": ["email"],
    "reminder": ["sms"],
    "promotion": []
  },
  "charlie": {
    "alert": ["slack", "sms"],
    "update": ["slack"],
    "reminder": ["email"],
    "promotion": ["email"]
  },
  "diana": {
    "alert": ["email", "sms", "slack"],
    "update": ["email", "slack"],
    "reminder": ["slack"],
    "promotion": ["email", "slack"]
  },
  "default": {
    "alert": ["email"],
    "update": ["email"],
    "reminder": ["email"],
    "promotion": []
  }
}
