{
  "manageEntity": {
    "action": "Save",
    "entityId": "592132",
    "entityType": "Track",
    "nonce": "0xb93884812a8b793463aa3ebc661f12d592c28103a3df0a8636a96bb2150aed3c",
    "signature": "0x4a1be9d368d9e250cdfd44afea9dc62aa71b7eedb712215a1352ca9d4844dcc813084f1797f6791ac905bdf5b5ec30e2845ff8be85f4853df29ba6a9d9cdfa9d1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}