{
  "manageEntity": {
    "action": "Save",
    "entityId": "134324",
    "entityType": "Track",
    "nonce": "0x7bcc0e25479d9c5bb4ff6139867790e4ef954eadde956ec03a8db4ed5427d6b4",
    "signature": "0xe6665a93883c1afc75075d081cc3218b8d91aefafe9b10785d5c623d869bf8ed2e18ea1c4ec10640054195fe8c8503c77299e27604c1e20564c96072b7150a631b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}