module.exports = { createdAt: { type: Date, default: Date.now, required: true }, hidden: { type: Boolean, default: false, required: true }, userId: { type: String, required: true }, activityType: { type: String, enum: [ "created_account", "created_station", "deleted_station", "created_playlist", "deleted_playlist", "liked_song", "added_song_to_playlist", "added_songs_to_playlist" ], required: true }, payload: { type: Array, required: true } }