{
  "manageEntity": {
    "action": "Save",
    "entityId": "327543436",
    "entityType": "Track",
    "nonce": "0xf8845f4b6de915c66b53f50e4ab7fcb0e547a3ad242db31512ccf25181c231c5",
    "signature": "0xbf58c6db2b07ae2271e6377d73c17f03458c91aadd059eb7c5af911c1e809e59694af00ca95496d4bf1205866e5d4bab59a7c065d815e8cecdd43252f05a5e881b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}