{
  "manageEntity": {
    "action": "Save",
    "entityId": "54153905",
    "entityType": "Track",
    "nonce": "0x13f0b2dd1fd2cf7aa32f39891c412fe8a4d6526ff66fc71ecd0677aceb825eae",
    "signature": "0x396c09fd5f8ca29fa2f131f0a708d03603fa825a5f416463265bdea8a8d333b37318cbc4140946a019de1641842e0bde10f87ced3e6cda5efbf82da6c3bfb5861b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}