{
  "manageEntity": {
    "action": "Save",
    "entityId": "1611524217",
    "entityType": "Track",
    "nonce": "0xdb7c4762a3953984fb316b6f3dd1451d568bc8f28de71cdc5a9849d1a6b06e5b",
    "signature": "0x8d23c08349292939997104a5eb80973a9d263786bb3e1f39123e57bdbdc54c453f9f59f8eb5f4dc29b7e3c56411f0cfc5aa9466ee771b77cfe9bcb74024c844c1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}