{
  "manageEntity": {
    "action": "Save",
    "entityId": "650358338",
    "entityType": "Track",
    "nonce": "0x15ed3663fcaaebfeca5105bf839eb29e1496cf9661173c34008954b91616aae4",
    "signature": "0x9af4d48def7a46ad110acf90ddd99b962b0e6018042fc9a500ab4e7fbf11ccfb15301c55c5cc1d48e569a025ee38f0169c6b101a9d763d27ad7b6a5e41204a721c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}