{
  "manageEntity": {
    "action": "Save",
    "entityId": "984829982",
    "entityType": "Track",
    "nonce": "0xcca7ead92936d0c96649da1a79c475b061a541ede8d320543d62c1d5c8c03069",
    "signature": "0xe19604bde63a34e05ce420cb16db91fae2ea30d85eeeceb82e313acf42d4a4d073424d1f6aaf5f7d9958ceca3e33d94d5dc6c7aeeb207d528c1f7a5304361da81b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}