{
  "manageEntity": {
    "action": "Save",
    "entityId": "460284010",
    "entityType": "Track",
    "nonce": "0x1ee337e18cee9218b5f29688bcb330edde4c99bc170b1df89b798b774049eacc",
    "signature": "0x41442e341686160ebee9a576e75f93518b27ae6bd131416503af7ee18b3ce4c5526b2b1168fcd9abbf9619c15d89b22c948bff774efef44e0194f611191799321c",
    "signer": "0xe4bD72b949e359ED9170c28151f5E9C3c75dfCb8",
    "userId": "67242552"
  }
}