{
  "manageEntity": {
    "action": "Save",
    "entityId": "234312",
    "entityType": "Track",
    "nonce": "0xb0a492dea7aff9e26f616b751b17a6af4744de0ea319174aa7ba06d0fb863beb",
    "signature": "0xf31319305ca314c56e665fbe3c6993f83a7c9b5887b5e625e1d817578209a5c80eb8173018df0fe791f194133432735e01641a8f67f0ba1ee4907f44987dfc081c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}