{
  "manageEntity": {
    "action": "Save",
    "entityId": "1744228936",
    "entityType": "Track",
    "nonce": "0xd131407021d7b621cb73eac095e8f33ecbfc65c37a9b74b7a858413a53d77f3e",
    "signature": "0x2a936f4d0cd3581a8b27ca88201c5260870dbc49bf6b1b34b97df3f5fdbd5053193e702dd236e9007a42ba522e6aff2727f7aff5550829df9e1ce3de9045cea61c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}