{
  "manageEntity": {
    "action": "Save",
    "entityId": "68564102",
    "entityType": "Track",
    "nonce": "0xd40362fb4eeef2096e2eb74787232c566a3a3acb46e9a18d7a7bba07ed1e5c3a",
    "signature": "0xd3e1527a4e890c59cba8577f4ab1c0ce8cb9e1f9975004b78d73716a4985421800a8e4192de39a57b0442eb1235d5951fc5b5194a9cc1fa0206bb2a10c5d80531c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}