Get date from TimeStampToken equivalent in Typescript

I have a web service that returns a Timestamp Token as a base64 string, I have this code in Java using BouncyCastle to parse, open and extract the date:

String timestamp = "...";

byte[] stamp = Base64.getDecoder().decode(timestamp);

TimeStampToken tst = new TimeStampToken(new CMSSignedData(stamp));

Date fecha = tst.getTimeStampInfo().getGenTime();

System.out.println(fecha);

now I'm trying to do that excatly action but in javascript/typescript, using either JSRSASign or pkijs libraries, those are the ones I have used in digital signature,

but I cant find an example of what I'm trying to do,

I have checked and tried to use the methods exposed by:

• in pkijs:

  import { TimeStampResp, SignedData } from "pkijs"; but there's not a method to receive a bytearray, I found this in the docs, but again it doesn't start from an already existing token...

• in jsrsasign:

  KJUR.asn1.cms.CMSUtil the method SignedData() only receives:

  (param?: {
    content: KJUR.asn1.StringParam;
    certs: string[];
    signerInfos: Array<{
        hashAlg: string;
        sAttr: {
            SigningTime: KJUR.asn1.TypeParam | KJUR.asn1.StringParam;
            SigningCertificateV2: KJUR.asn1.ArrayParam<string> | {
                array: string[];
                hashalg: string;
            } | KJUR.asn1.cms.SigningCertificateV2;
            SignaturePolicyIdentifier: {
                oid: string;
                hash: {
                    alg: string;
                    hash: string;
                } | KJUR.asn1.cades.SignaturePolicyIdentifier;
            };
        };
        signerCert: string;
        sigAlg: string;
        signerPrvKey: string;
    }>;
  

does anyone has an example of how to parse the base64 or the bytearray, and create a Timestamp Token instance to extract the date as BouncyCastle does?