{
  "manageEntity": {
    "action": "Save",
    "entityId": "996794741",
    "entityType": "Track",
    "nonce": "0xe3fd406621ab45632c7d888a6e7c413266486ca547c349d8dbc60047d6aa4ba5",
    "signature": "0xc45b49ca9e06e6a5006c9c7773d1fbb4132c8e432f953f2f093c040105c8a1d513896a23e705bdb624015cc14fc747620b202852df5364ab50c45988d5330b381b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}