{
  "manageEntity": {
    "action": "Save",
    "entityId": "2053234693",
    "entityType": "Track",
    "nonce": "0xf0f951613de4e1b56076f1aae916b3f9f542afa24cdd801a3e63cd32e81a5005",
    "signature": "0xcba4a98dccc65997609d8982c060ba5a4913bcae32ed314eef7b36ab93575ada1736d1c53ae65a02589f132ec60de8b632435f915039b1b306a25d282a108eb01b",
    "signer": "0x5c3A14eAd942d7299d7814f8FF5A846934B13463",
    "userId": "450598201"
  }
}