{
  "manageEntity": {
    "action": "Save",
    "entityId": "308454666",
    "entityType": "Track",
    "nonce": "0x5ab24e06efd7dbeb7df7ffcf801f77d1c95e33817c8058aef2d915ef8ab14a24",
    "signature": "0xf03ab2a14bdfd84ba9f4ae5680b66d1e8305d9764682cd04c890df2574b0ea004996e39b9b7ca8004e40adbf96430f6ae0bc36498aee9a9271e2d701191082791b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}