# DIDComm Payload vs. Identity Hub Payload

**DIDComm Payload**

{
  "typ": "application/didcomm-plain+json",
  "id": "1234567890",
  "type": "https://schema.org/MusicPlaylist",
  "from": "did:example:alice",
  "to": ["did:example:bob"],
  "created_time": 1516269022,
  "expires_time": 1516385931,
  "body": {
      "@context": "https://schema.org",
      "@type": "MusicPlaylist",
      "name": "Classic Rock Playlist",
      "numTracks": "1",
      "track": [
        {
          "@type": "MusicRecording",
          "byArtist": "Lynard Skynard",
          "duration": "PT4M45S",
          "inAlbum": "Second Helping",
          "name": "Sweet Home Alabama",
          "url": "sweet-home-alabama"
        }
      ] 
  }
}

**Plaintext Hub Message**
Alice -> Bob

{
  "descriptor": {
      "objectId": "uuid-v4-1"
      "schema": "https://schema.org/MusicPlaylist",
      "method": "CollectionsWrite",
      "encryption": "jwe",
      "cid": CID(data)
  },
  "data": { 
    "protected": ...,
    "recipients": ...,
    "ciphertext": Base64Encode({
        "@context": "https://schema.org",
        "@type": "MusicPlaylist",
        "name": "Classic Rock Playlist",
        "numTracks": "1",
        "track": [
          {
            "@type": "MusicRecording",
            "byArtist": "Lynard Skynard",
            "duration": "PT4M45S",
            "inAlbum": "Second Helping",
            "name": "Sweet Home Alabama",
            "url": "sweet-home-alabama"
          }
        ]
    }),
    "iv": ...,
    "tag": ... 
  },
  "attestation": {
    "protected": {
      "alg": "ES256K",
      "kid": "did:example:123#key-1"
    },
    "payload": CID(descriptor),
    "signature": Sign(protected + payload)
  }
}

**Signed Hub Message**
Alice -> Bob

{
  "descriptor": {
      "objectId": "uuid-v4-1"
      "schema": "https://schema.org/MusicPlaylist",
      "method": "CollectionsWrite"
  },
  "data": {
      "@context": "https://schema.org",
      "@type": "MusicPlaylist",
      "name": "Classic Rock Playlist",
      "numTracks": "1",
      "track": [
        {
          "@type": "MusicRecording",
          "byArtist": "Lynard Skynard",
          "duration": "PT4M45S",
          "inAlbum": "Second Helping",
          "name": "Sweet Home Alabama",
          "url": "sweet-home-alabama"
        }
      ]
  }

// Daniel's DID Doc
{
    "service": [
        {
            "type": "DIDCommMessaging",
            "serviceEndpoint": "did:ion:mediator"
        }
    ]
}

// Mediator's DID Doc
{
    "service": [
        {
            "type": "DIDCommMessaging",
            "serviceEndpoint": "https://mediators-r-us.com/didcomm"
        }
    ]
}