{
  "manageEntity": {
    "action": "Save",
    "entityId": "1646754179",
    "entityType": "Track",
    "nonce": "1790010878609756098",
    "signature": "0xdcc532fa180098a44a178ef8bc546d7af3b6ca5988946d193bb202cbcaea8a830baec9c407a9e8f700fff5c69710b23916d0e8bd7575e27c7d0f44563e4c00b21b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}