{
  "manageEntity": {
    "action": "Save",
    "entityId": "1677854096",
    "entityType": "Track",
    "nonce": "0x34a9b0cf856a2d00d494d215d2d66935aa9819a2c98fc31d319466b47ee1fc71",
    "signature": "0x6846d93a7227013b8386e6379b3ece3ad595a531ba34b9ab0a3ce4d8dabedda708c46264f290507f1943e8c79c19d297e305543d35494b5c1297ff0a0f0089711c",
    "signer": "0xb18D2c0C8Aae7bA7C122784dDaB20C1f2876D3A3",
    "userId": "777619552"
  }
}