{
  "manageEntity": {
    "action": "Save",
    "entityId": "1432481808",
    "entityType": "Track",
    "nonce": "0xad3176f7be6c2002af922c196ea866629702944d670f84e30b53b645525d6efa",
    "signature": "0xf0d92147033eb6b082036033d8684554cf6ce3c20e0ef220e171d306e51b51720c862eea22fc7a849c7ad4f299cd624161eaa6d6312ac17fbb1aab439768dcd01c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}