{
  "manageEntity": {
    "action": "Save",
    "entityId": "291333079",
    "entityType": "Track",
    "nonce": "0x798d96763315d46d311ced33d50f7132f107cffb931d2051dde925ee689b2364",
    "signature": "0x9a4292a6c192ed35404843b79dfd1acecacc4b2b423ed9d823f5f70ce8a2b20d66de124191e5a4ef9007cea5a185817263f0e36df0d43466681aa7ad69677dde1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}