{
  "manageEntity": {
    "action": "Save",
    "entityId": "330453131",
    "entityType": "Track",
    "nonce": "0x0160774614f71c690b034c132cef172c9edbcbbf6e45d28b752bdd6c900620a7",
    "signature": "0xd2f47b3139279cadc4b4c93cf0b024a4eca90c97a792213710f524a27f90fe9219e81b93ecf16747fbaf2c7254f66cb43b7b58c6de16a28db64ec061d55d61ac1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}