{
  "manageEntity": {
    "action": "Save",
    "entityId": "122895934",
    "entityType": "Track",
    "nonce": "0x535fc01cb6761f625b1bf2a0b65d791b5c00966b91d67d84656c8c6859a667c9",
    "signature": "0x8fe004b669d08566995c39cd1ffaa1a43174c2a24f77f78e684a8ff7c7a08e507f8b92e72f7ffda9b4afe09d8516fd1d384617c35ff96c586f5a2f4c79e146cf1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}