{
  "manageEntity": {
    "action": "Save",
    "entityId": "1688707015",
    "entityType": "Track",
    "nonce": "0x2645a61cc0af13c54d471f9c3c805a045156c8f5a344953bee84bb88457136f8",
    "signature": "0xf4e9dc2cc0930d86a4756fdde30af404e88251d2905d1080f483d1aa48dbad51083c2f70ce3511dab9b3c64aa1b5c4669ce0a598fafd4cd71b3d6510750b17f11b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}