{
  "manageEntity": {
    "action": "Save",
    "entityId": "1260115560",
    "entityType": "Track",
    "nonce": "0x3037ce45112203645fc8c88a40b8ed8b6fa205df59a2b453735536c989938a72",
    "signature": "0xde93e7d5b0c880c39519d21c9d63f008c7680422af43571afa3c038d5f2f9deb249acf0dde783de8e33c7cf54cca741b4e068107bef393bb23104c62e3d725331b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}