{
  "manageEntity": {
    "action": "Save",
    "entityId": "1964054263",
    "entityType": "Track",
    "nonce": "0xa5bca3c53d1bcd0f25ce1a244609708e3da860f404be51e5baa2b1b1750b8de0",
    "signature": "0xdd12b87923558546bb6fb47e05fd217c11bedcc9b3a6ade70897f40a03c6a81279f28bb1ae95de957463d716e2acda6ea6a57414fc7a6f625d4bc2edafd9c8871b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}