{
  "manageEntity": {
    "action": "Save",
    "entityId": "1959914892",
    "entityType": "Track",
    "nonce": "0xd31f8f11742e4a6e572d04cac4924eda0e9ef77a9e04d53b2fc736b9a0eb253e",
    "signature": "0x341938a471b489d8b5086aa2412125480e36d94ce8d510291f0a0b2403636ad50189abe26ac042a4ef4ee5b90f1291d9e8e5afa7e3a7199276faef695555ffbd1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}