{
  "manageEntity": {
    "action": "Save",
    "entityId": "1783985635",
    "entityType": "Track",
    "nonce": "0xcbf4ae936873231bf9fd82b32d65537c785ba3134cf06bb52dad9e470c53c5f4",
    "signature": "0x19010ea42599779e241f3f69b2edc1b45b94f84d96f2cda8a1d6351d2eb7ebaf6a476575e899a6fdc172fdabaf2ca4434535f5119225f807ccaebd44c2fc00c11c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}