{
  "manageEntity": {
    "action": "Save",
    "entityId": "277721977",
    "entityType": "Track",
    "nonce": "0x508442e95d7ba307dae80e26ea26b42327e766a885025f342443222f661344f9",
    "signature": "0x0bd77ceeca313839c927ad18192eab2a18e002b196825080cf1b176d951782177d7e0686ba7585d21ecde535d0039c8082fcbb783f43e290145b2c7d206d62621c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}