{
  "manageEntity": {
    "action": "Save",
    "entityId": "25202",
    "entityType": "Track",
    "nonce": "0xb270eb322dc12024b701787ab5385c5bc43cbd5985086d65acc1b88c36f85b8f",
    "signature": "0xb5e678f3b443a25a2cb6b383bfb6d72f6ef06bb9b9c723aadec5c76157cfbc37550329c082c81a00a56ab311c2ec6f7267d11cfd37dd79bc8fbde6c3aff8a4611c",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}