{
  "manageEntity": {
    "action": "Save",
    "entityId": "1293132653",
    "entityType": "Track",
    "nonce": "0xaf46f48af418a27844d38dc22ef41a7bd6facc84c938160769f3b97ec006d087",
    "signature": "0x21ed689d3f625d806c51218f3e41412bbf439ba241ebca41af957fb8a1cf79096510363658180af6e09151a55ca4af27c519426b84c361fc98a1930dc98d75691b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}