{
  "manageEntity": {
    "action": "Save",
    "entityId": "115377965",
    "entityType": "Track",
    "nonce": "0xce4654e8d162f5ffab83f53fea904e4bf5f8152d9af9ecbbbb4d8c50afa96af9",
    "signature": "0x4924e2996ee00fc083040eb8aeeb24c236390b648a795b5d154a034d006919b30443e829e8ce3e7958fea95d06a9aa1444f79fbcfd45f157390b1d030515a18f1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}