{
  "manageEntity": {
    "action": "Save",
    "entityId": "790213765",
    "entityType": "Track",
    "nonce": "0xe69d9c3c11f8ac109153ffdb7431affa6a215d0479aa956bb90f896058ba71f0",
    "signature": "0x6917c5c5035af5a88f2c7b8ca11f9ab86d86528ca6600812df57efc4d9b1226a0c3b22e22374f7a8bb1ea078e120cb17bdb50b3905cb6d56520e640cd261144e1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}