{
  "manageEntity": {
    "action": "Save",
    "entityId": "947516038",
    "entityType": "Track",
    "nonce": "0xc2e979e287a0cd1ab190564d1d6c81a2f24f5c27efe1e7afa156e86d509ab6ce",
    "signature": "0xd1d1e5d22d78e0021049f44fca04002a295167de2424f75aa73035a4d8d376ea37b0941313a76321457c867b220bb2c9b0692b5de0bc54e863dfd9148f7b87c91c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}