{
  "manageEntity": {
    "action": "Save",
    "entityId": "1009808",
    "entityType": "Track",
    "nonce": "0x93bbbd53c42cb85c0d58858d116ef710c9880ae48e2631df89eeff4589867e5f",
    "signature": "0xe884d2167ed1ace50507047052bde62ec7499abfae57dae6fea0b6abf4f7c235782e3a01a6d03e2c6783f56549a06b393487d58c360bf4e46a526f45e75716001b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}