{
  "manageEntity": {
    "action": "Save",
    "entityId": "28935382",
    "entityType": "Track",
    "nonce": "0x2213799ffbf0a7c09194314f71c86b0b37dab0db2607d7771d799973fb6dffb0",
    "signature": "0xb3a84e5c7ceffbb35eeeb6ccb81b4c2d6cbf4c151d89e3c3abdbfa55feb8a14e3d7d69445254dc8c91102b38243b122ab8c63cf674cf6974adbbb237902ee6161c",
    "signer": "0xE69EE1e71C27cDfa05141f1DCE82bF0231AD05f1",
    "userId": "933842159"
  }
}