{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834641839",
    "entityType": "Track",
    "nonce": "0xe52610f73defe617b3ea5b130141c85338ec572a3e0401526f0196740ee17a5d",
    "signature": "0xfb974a9e80c3f96563e325114d9709073468929e0f604656a3af5405837181f65211e73b7152b5801b03a9c19021cac8861104acc596834969fc7e8a280466ce1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}