Why do profiles have decoded tokens?

Why do profiles have both encoded and decoded tokens?

Example:
https://blockstack.s3.amazonaws.com/larry.id

[
  {
    "decodedToken": {
      "header": {
        "alg": "ES256K", 
        "typ": "JWT"
      }, 
      "payload": {
        "issuedAt": "2016-12-05T09:03:31.354235", 
        "claim": {
          "account": [
            {
              "proofType": "http", 
              "identifier": "larrysalibra", 
              "@type": "Account", 
              "service": "twitter"
            }, 
            {
              "proofType": "http", 
              "identifier": "larrysalibra", 
              "@type": "Account", 
              "service": "github"
            }, 
            {
              "identifier": "1EyuZ8qxdhHjcnTChwQLyQaN3cmdK55DkH", 
              "role": "payment", 
              "@type": "Account", 
              "service": "bitcoin"
            }, 
            {
              "contentUrl": "http://pgp.mit.edu/pks/lookup?op=get&search=0xDE3B5425164C4849", 
              "identifier": "B516CB7A08819697B25E4694DE3B5425164C4849", 
              "role": "key", 
              "@type": "Account", 
              "service": "pgp"
            }, 
            {
              "proofType": "http", 
              "identifier": "larry.salibra", 
              "@type": "Account", 
              "service": "facebook", 
              "proofUrl": "https://www.facebook.com/larry.salibra/posts/10100341028448093"
            }
          ], 
          "name": "Larry Salibra", 
          "image": [
            {
              "contentUrl": "https://s3.amazonaws.com/kd4/larry", 
              "@type": "ImageObject", 
              "name": "avatar"
            }, 
            {
              "contentUrl": "https://s3.amazonaws.com/dx3/larry", 
              "@type": "ImageObject", 
              "name": "cover"
            }
          ], 
          "@type": "Person", 
          "website": [
            {
              "url": "https://www.larrysalibra.com", 
              "@type": "WebSite"
            }
          ], 
          "description": "Blockchain, software, security. Decentralize the world (w/ #bitcoin)! \u8b58\u4e2d\u6587", 
          "address": {
            "addressLocality": "Hong Kong", 
            "@type": "PostalAddress"
          }
        }, 
        "expiresAt": "2017-12-05T09:03:31.354235", 
        "subject": {
          "publicKey": "04960d97b72885cbce3773cc6faacd77f3baf9e80dc4b7c1b77bc469ef6585541aedf4454a61815575573ef9a9821871d8fe6a3ad3ecde60f1db2a104100639c49"
        }, 
        "issuer": {
          "publicKey": "04960d97b72885cbce3773cc6faacd77f3baf9e80dc4b7c1b77bc469ef6585541aedf4454a61815575573ef9a9821871d8fe6a3ad3ecde60f1db2a104100639c49"
        }
      }, 
      "signature": "GZIIMlDTEC1lTmYi6Fc6RV7LasIxcRc41s8AVTqNElKs7OxVr81tRncLrN430fvRgdesp8iycFBRWpkvPovT5Q"
    }, 
    "token": "eyJhbGciOiJFUzI1NksiLCJ0eXAiOiJKV1QifQ.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.GZIIMlDTEC1lTmYi6Fc6RV7LasIxcRc41s8AVTqNElKs7OxVr81tRncLrN430fvRgdesp8iycFBRWpkvPovT5Q", 
    "parentPublicKey": "04960d97b72885cbce3773cc6faacd77f3baf9e80dc4b7c1b77bc469ef6585541aedf4454a61815575573ef9a9821871d8fe6a3ad3ecde60f1db2a104100639c49", 
    "encrypted": false
  }
]