export interface IActivityPayloadResponse {
    conversationId: string;
    messageDataStreamType: number;
    messagePayload: any;
    version: number;
}
export declare class ActivityPayloadResponse implements IActivityPayloadResponse {
    private privActivityResponse;
    private constructor();
    static fromJSON(json: string): ActivityPayloadResponse;
    readonly conversationId: string;
    readonly messageDataStreamType: number;
    readonly messagePayload: any;
    readonly version: number;
}
export declare enum MessageDataStreamType {
    None = 0,
    TextToSpeechAudio = 1
}