{
  "manageEntity": {
    "action": "Save",
    "entityId": "304586938",
    "entityType": "Track",
    "nonce": "0x5c895cb497c8d1aad3d821d026763328bfcad7aaec182e6b2b188db34d05afae",
    "signature": "0x4125b4e6a7496aebf2e24dca528988889fd0dce0f5a80d7b6a44b6e6d36d7985061d55ba31a1b750059bacc6eff2e051a11333492136e65bcba88389dcd6127b1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}