{
  "manageEntity": {
    "action": "Save",
    "entityId": "973031136",
    "entityType": "Track",
    "nonce": "0xbfa11a67da1665c627788e3fbb11d28d42a05aaf304f2f4c288012497092099a",
    "signature": "0x042f391beb0d35e99ee9bda72e9f6333021841390b7949263969a38c87d896d05e1ef48e8702056b603420d88b4084b49459842620a382fd1c64be71d64cb5041c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}