{
  "manageEntity": {
    "action": "Save",
    "entityId": "853694",
    "entityType": "Track",
    "nonce": "0x4ed8863d4e295f73e901b616c87c0081c0da9c869ad59c5bd0d488cfd058e611",
    "signature": "0x1eb72b3c395d7e6ec991613723f5c39454137782993132cba85c46910d7acb0b752434837a6175c0a1239a29b10ea911e66949e038c00d20c4aa24b21930ebcd1c",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}