{
  "manageEntity": {
    "action": "Save",
    "entityId": "1981614269",
    "entityType": "Track",
    "nonce": "0x92159bae3c955c7b8003bb397f119fae2c7c728e8a359937136c788f6273c5b8",
    "signature": "0x2f4d7a5907d175f8f4da03c64e2e0252c4264cf96803a511177ce6fd7db172966ac6e9804ccf5edfceeb9a7b3187a05d955ab593764aa7be5f143ae92d11b3231b",
    "signer": "0x316933E449A0b429014E405447c447C9Bc472bE9",
    "userId": "451684863"
  }
}