{
  "manageEntity": {
    "action": "Save",
    "entityId": "1315029219",
    "entityType": "Track",
    "nonce": "1792393729443812128",
    "signature": "0xb5b50292f2bdb2c55e451eec388ada8767bd320871ea5a196bd4fdaed1f8354513188224d504f25b9460ca797ca4b05e1a5a61413246a952931fea920d87ae3c1c",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}