{
  "manageEntity": {
    "action": "Save",
    "entityId": "688243571",
    "entityType": "Track",
    "nonce": "0x33127eae744c5098a56050f6173a1807e14a18d88416335499818b51f18d75c1",
    "signature": "0x7b3f67830f16abc77bf94b2a9b908d846738ee335dcfe62b98f11f487239dee95f327d92391be7b9c63773bfe9b860c8bab108a132a2a57a4ce3eb64bb3d0e2c1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}