The message imprint in the signature-time-stamp seems to be not correct. It is expected to have the SHA256 of the signature value in this message imprint.
SHA256 of the signature value:
1b4532052d612ca32ae96b9a8e7aa6d64ae6c69dc00e1b7b31394ac3b54c4049
The message imprint in the time-stamp token:
E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855