import { BaseModel } from './base-model';
/**
 * Represents the signed properties for a document
 */
export declare class SignedProperties extends BaseModel {
    private _id;
    private _signingTime;
    private _certificateHash;
    private _issuerName;
    private _serialNumber;
    get id(): string;
    set id(value: string);
    get signingTime(): Date;
    set signingTime(value: Date);
    get certificateHash(): string;
    set certificateHash(value: string);
    get issuerName(): string;
    set issuerName(value: string);
    get serialNumber(): string;
    set serialNumber(value: string);
    /**
     * Converts the signed properties to a JSON representation
     */
    toJSON(): any;
}