{
  "manageEntity": {
    "action": "Save",
    "entityId": "694428530",
    "entityType": "Track",
    "nonce": "0xc4e5bb7fc938afb50c89be347a77dab6e28ee75ff8e38847bd466c8caf2a96a1",
    "signature": "0xb2a2b799499468e41a897dc2454a16f92a09929d32062163a21de6c00c3e8f5d08198f023d8f24c82906422e4e4afaa4066a727654dea06c096642f3f656b9d61b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}