{
  "manageEntity": {
    "action": "Save",
    "entityId": "205931",
    "entityType": "Track",
    "nonce": "0xc39509f9a5a208aae828f3b7552664f4ef96d8ce613a311e5f2d88820cfbfeba",
    "signature": "0x42ed7339b76ad55f1e2553788de65924928b5a9e8e11630a7908a9886930472f09d6635927936cc9aec856485c3712fba596377381c59f23332969927285bf1e1b",
    "signer": "0xE83eb37Adee021461D9d1A141Ab395A6CE0B6299",
    "userId": "154583694"
  }
}