{
  "manageEntity": {
    "action": "Save",
    "entityId": "1434104333",
    "entityType": "Track",
    "nonce": "0xd203c780979bfcace78e061145b54a964aeb3438bb5e14663b1310a18b571806",
    "signature": "0x485d5b9066c99515ae6b0b04a629972c3c438b6d664ba5951733d88c042992db2b8c9febfa9aca04364335874d932bd1f2b961c398b8f0ee9d95d666256006081c",
    "signer": "0x98fC2b30E6e70e62dB2b5fAE7b0292DE3D4323Bf",
    "userId": "480962013"
  }
}