export default { trackId: { type: Number, unique: true }, title: { type: String }, artworkUrl: { type: String }, soundcloudCreatedAt: { type: Date }, duration: { type: Number }, genre: { type: String }, kind: { type: String }, license: { type: String }, likesCount: { type: Number }, playbackCount: { type: Number }, public: { type: Boolean }, tagList: { type: String }, userId: { type: Number }, username: { type: String }, userPermalink: { type: String }, trackFormat: { type: String }, permalink: { type: String }, monetizationModel: { type: String }, policy: { type: String }, streamable: { type: Boolean }, sharing: { type: String }, state: { type: String }, embeddableBy: { type: String }, createdAt: { type: Date, default: Date.now, required: true }, documentVersion: { type: Number, default: 1, required: true } };