Decoded sample ‐‐ why so many SEQUENCES ?

This is a lot of nested sequences. Is that right?

 421 2557:     [0] {
 425 2553:       SEQUENCE {  -- CSR attributes
 429   11:         OBJECT IDENTIFIER id-aa-evidence (1 2 840 113549 1 9 16 2 59)
 442 2536:         SET {   -- This attribute
 446 2532:           SEQUENCE {  -- EvidenceBundles ::= SEQUENCE SIZE (1..MAX) OF EvidenceBundle
 450 2528:             SEQUENCE { -- EvidenceBundle ::= SEQUENCE
 454  754:               SEQUENCE {  --  EvidenceStatements ::= SEQUENCE SIZE (1..MAX) OF EvidenceStatement
 458  750:                 SEQUENCE {  -- EvidenceStatement ::= SEQUENCE {
 462  746:                   SEQUENCE {  -- ???
 466    4:                     OBJECT IDENTIFIER TcgAttestCertify (1 2 3 999)
 472  692:                     SEQUENCE {
 476  145:                       OCTET STRING
         :                     FF 54 43 47 80 17 00 22 00 0B D2 0D 5C EC 8F 00

The full CSR is here:

-----BEGIN CERTIFICATE REQUEST-----
MIIMsDCCC5oCAQAwcjELMAkGA1UEBhMCQVUxDDAKBgNVBAgMA1FMRDERMA8GA1UE
BwwIQnJpc2JhbmUxGzAZBgNVBAoMEmlldGYtMTE5LWhhY2thdGhvbjEWMBQGA1UE
CwwNaWV0Zi1jc3ItdGVzdDENMAsGA1UEAwwEa2V5MTCCASIwDQYJKoZIhvcNAQEB
BQADggEPADCCAQoCggEBAKLiEVeBRqjfNVr78uGazsCGMU0IiO777H31R48G1ltn
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VENHgBcAIgALxGcadyzDJ6bIgAnhLvUYifvosrkcHbW7pF7QhtYH6zoABAD/VaoA
AAAAJBkWcwAAAAIAAAAAASAZECMAFjY2ACIACwu5woi8KjkV896G5251p7lHtcj/
sB7870T03+13teHnACIACwKzl9hNiZvp5LxKTDtDFALfmm4PNApHRQiiQ5IXArwI
BIIBAIwC+8RQRs0rDyjZQtXRIVGxE9GNBvXRR9/cgL6fYdxumO7iYMw9+1I5AGLb
a9SAbzW8WcVnQTz34b9uDYItG/rGWL8KstPYWYlfac51d03Ui1lHIElihFH/EVLw
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-----END CERTIFICATE REQUEST-----