{
  "manageEntity": {
    "action": "Save",
    "entityId": "624833375",
    "entityType": "Track",
    "nonce": "0x92b7557e8e8ae4fb803518ecc692adee1dee399b40a2b6d801afdd7c0e33a83b",
    "signature": "0x77c54544fbb339a3c5c953152c17667cc2c56aaff82ebd90fa4a108b80bff95c7885db1f535cfe266a50bea982b92c20edf948cfa46ef5ba10036346b0b05f611c",
    "signer": "0x4E802f7193313C8D55a39077f1DD13479712F61b",
    "userId": "227068227"
  }
}