{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125218803",
    "entityType": "Track",
    "nonce": "0xfc8b563a6d6c203ba6b62379d07673b6eca86dc84944a453ecf8cbf5adc256df",
    "signature": "0x6c091ccce2c6cf8b59c396760b8093c6ebee0e7ea77672841bdf9e12ca94d1b42ad2378d05816fe637a3180d0af1afd70af55ba7fd18970b5852744ed0b3b2ae1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}