{
  "manageEntity": {
    "action": "Save",
    "entityId": "4007178",
    "entityType": "Track",
    "nonce": "0xbcdedbbc37efd9c4ccd8d266537a917e5c65e340b0bcb27e55441b7fab2b190e",
    "signature": "0x27b30afbba0e4311f6863bc3268b5f2982287fbb15d25a256c5aaba0ceaa087d7e65eed8bc55b4cca085b15accf096fb7a7ddc370e58c5e38dbac4cafc4218021c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}