{
  "manageEntity": {
    "action": "Save",
    "entityId": "224227",
    "entityType": "Track",
    "nonce": "0x91be4958068ce8f959b8b62ec204d7d3caf1b5522585075a9732b5479af59b84",
    "signature": "0x9b2caf1fded98e1bd0c6df6a6ed8431702ce93797539ef3f5de73ffc5e435b2d2667fa1325e895a31ebf293484ef7f068eea38eb04518cf468e061b5997ff6cd1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}