{
  "manageEntity": {
    "action": "Save",
    "entityId": "669256",
    "entityType": "Track",
    "nonce": "0xb508af70f549e76eed9f729fb8a8e0158e4ae65b6dbeebabb29b9c06db68fc93",
    "signature": "0x0a9b172c9e87aee886267c1f79f63c9071cee37bb4f73dab4a85caced640fd9b59fca131e1cf01a0e1760260534669a7d7b1e7540d0b043a44c9b01ac715a6ff1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}