{
  "manageEntity": {
    "action": "Save",
    "entityId": "1864284191",
    "entityType": "Track",
    "nonce": "0x2b007a04d16fb87a95b60f6ba080933ff45e1671d8c23785e376791c6c5ffa62",
    "signature": "0x8308c2882e20fed3598b1251ac33f75de7aa42d532756e6b483a3ae817bbebb7668f11f3e2c251880e9213113c2089a60a6bfc3b5bf8742f340a2d7cb243ee561c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}