{
  "manageEntity": {
    "action": "Save",
    "entityId": "1593863098",
    "entityType": "Track",
    "nonce": "0x6bc7e2cbeb25ffea090a4ee5561d8b2dc1065a277c46436a6289473ff3b74df7",
    "signature": "0xeed42cf8e4e89e890501adf96bded86273642835f91cd867bea20bf34d65ae9e174c38873c9f87c95a74d137a1197b6b0009ee3ae47e6409dd50418c0620b5411c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}