{
  "manageEntity": {
    "action": "Save",
    "entityId": "1431576099",
    "entityType": "Track",
    "nonce": "0x69f8b140edc1dc32d5e100b8485a532e086ecd653a14dd59db198b4ebba8ce8a",
    "signature": "0x354035ab4a55b1570226208e94f88b20c575715c03675b2bc4596d8cfe1f11df08da869f136229589a1cd8f7a44c4b37e7dd7ead5e9c6a75189735fca46867051c",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}