{
  "manageEntity": {
    "action": "Save",
    "entityId": "1931244227",
    "entityType": "Track",
    "nonce": "0x1441f0a7a51c318dcc2c3df50561742f819942ec8b6fcb0144c39bbee58ba775",
    "signature": "0xb98f5ec1bd3c239dbfe82285524461343ac582bbe714f954523d808d41ffed4641bb27c67c81104a40ea491825c8bd7854ced2fff6a1fd4ccef9c88c804525451c",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}