{
  "manageEntity": {
    "action": "Save",
    "entityId": "237361",
    "entityType": "Track",
    "nonce": "0x9c6bb133853058237fe211fb5410724a6f401aac508664c14971ca3418dd78a8",
    "signature": "0x3cc62e7e41dde64c3c78affb2148e01f020c7d5b848bf5e58f8d124ba1a21964017b1d788b784234dcf9265a2bca748ac59450163f1059245c7949fd2fedd3771c",
    "signer": "0x2f890F488c7DE6221893B82B90bea73E2304cE3E",
    "userId": "344578316"
  }
}