{
  "manageEntity": {
    "action": "Save",
    "entityId": "533092147",
    "entityType": "Track",
    "nonce": "0x559e3c28f292d1bd4f886616345316b9ae14352aae90494589573d05af401f20",
    "signature": "0x909b8f75986967161dcc5f6fee9d32b4b1948b162fb34c2c911c099df8ae1b2041607c9bede8d22f1915a79617e3e65151f77b8c0982b616d4320a7cc184c18d1c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}