{
  "manageEntity": {
    "action": "Save",
    "entityId": "698285778",
    "entityType": "Track",
    "nonce": "0x3da8af1475a49bb9f22f897ff81594dcf63ca458df5c994df4af58af53b34526",
    "signature": "0xd33bfc458715ea2e5de1d749029bdab21388b1141c5902f09a5530bce3c41fb5357a180ec494de540079d2f629f520db75cd7966fb0b7a57ee05b49069ef48041b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}