{
  "manageEntity": {
    "action": "Save",
    "entityId": "440357235",
    "entityType": "Track",
    "nonce": "0xfdc0f3ff01feb0b7464d86a413618c3604ef15efc7b8d1c32d5254e88c6dd339",
    "signature": "0x1c59e7b3bc073d387078292f1d0ff73211c505ddc055d679f08a2f70be0f35946edd0f8c8c3d799043af97df7c67bcbd7a2bd4054dc08ef9493d0006a85b09271b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}