{
  "manageEntity": {
    "action": "Save",
    "entityId": "673362",
    "entityType": "Track",
    "nonce": "0xd36ab2466411bc040551ca4df118d8b13b68185170d61849435c78e177396fdd",
    "signature": "0xebba05f471ac4f1ce2086798be513dccf4142cedf732305dcaad3eaa59110d8b109da3999394593d62577d5a4c973b23b0f974cadb83fe45ca333277340ee96d1c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}