{
  "manageEntity": {
    "action": "Save",
    "entityId": "694407472",
    "entityType": "Track",
    "nonce": "1786733212239575815",
    "signature": "0x40f53933b4d6e589da5fa176979b7cc11b1f4ef8d3b7b245c4e00297a6cd505c7b6f2ac364a69c9511c9af9be9188c96d64d750ec6d10f26b432bd0185dc5c171b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}