{
  "manageEntity": {
    "action": "Save",
    "entityId": "658120355",
    "entityType": "Track",
    "nonce": "0xd9b4e9ed1392900ce708ffcba65f847abaae7d6d93b18e73009fea05eafb214a",
    "signature": "0xbfbb14d315eb1940cb755b26dbb2a662bd03d768e6d7b1633d5e25d2cba613c60d54e149592f8f1c661d31df6b04221fcdb28746b16ecd57e02f483f29d089651c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}