{
  "manageEntity": {
    "action": "Save",
    "entityId": "2040679079",
    "entityType": "Track",
    "nonce": "0x3f111de09a708e1b88c9aa15210496dd97d46c8d72d3706bb7a7d02bf8de854e",
    "signature": "0xcdcc1515841f6f1715c05a90d4b2467508f8b9d34bdf33e1aaab52fc2614583740a59120caa19946a2747a40a8f2ef291c887e7f1f6633fc4e5b78ec91b2b66e1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}