{
  "manageEntity": {
    "action": "Save",
    "entityId": "1640026086",
    "entityType": "Track",
    "nonce": "0x81182016beb4786a08797363288db926a66d1656d37616ef7e047dbedcb1e67b",
    "signature": "0x45181d67d0e96fbc20222b3340473a49e256e7a4af5901c17e0596b165a487c06babe87a0ce23bcc35611c0d868dde882d50a7303b25fa12c31099a1097bea281c",
    "signer": "0x4cd4EAe6AcF1d2fa1Fd61eAce803597613DbaD92",
    "userId": "114543"
  }
}