{
  "manageEntity": {
    "action": "Save",
    "entityId": "2045921796",
    "entityType": "Track",
    "nonce": "0xf43ce3f7d95becd8d1128b86029dee1cfd82dab4b78fcdab5a799167be5db05a",
    "signature": "0x4839665ca8c0a9b7509a70b4f636cf5ecd5312b25ee828217c7f434373deaccf3cbc4dc56421f79b9bc3008fde01a57dc449b31791d75f344a22d9ff347996c21c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}