{
  "manageEntity": {
    "action": "Save",
    "entityId": "2047595592",
    "entityType": "Track",
    "nonce": "0xc3b9252e3b7af66fca8fc851618035faa51940661938d6caa97a425fe0aa7382",
    "signature": "0xa6c479c4eda63aac75826c7a71544764e355f18fdd73a9cf7f3f75ace852b93c472ef69893b28f372c8bd4c3c735b2ea3cb595525b30f97df21e1b3020a44b6b1c",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}