{
  "manageEntity": {
    "action": "Save",
    "entityId": "107925093",
    "entityType": "Track",
    "nonce": "0xc3831fa6f2de938b404e3dbe2cb1e5be53b4058b70fd9857c54bdf94d4fee40a",
    "signature": "0xe149e5842a43299c8bdf0bf0a17fcf9d5a3ea8df42a4cc831f9dc095020217a362ece340087338697b00feed73061c4ef420c97b7a8f1cef5bacefa3f28d35d71b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}