{
  "manageEntity": {
    "action": "Save",
    "entityId": "1476061274",
    "entityType": "Track",
    "nonce": "0xfe2a18e273c5c30a99e63e22430dd7546e20c5b507965991ee6e368356b1643c",
    "signature": "0xe3a014fb896d913696817760d400cb7afd440ff195309f1f7448190285fcb11e540a42e7b27199d23d214c16a7a845161a1cd6abec7023f9bdbf35f219e6d2e91c",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}