{
  "manageEntity": {
    "action": "Save",
    "entityId": "221459096",
    "entityType": "Track",
    "nonce": "0x69357589fa9f50a71fd584105d8bb5d9f0c02d4663bdbc1e79d79864ebe57a21",
    "signature": "0x9c638056143468bee4dda24297a4eef13c03a2016d7bc27f5e65a0a0322004075584926d484a151d32c5dc1da56338a4f6b665f50f8ff3b5a25b621a19f9dd301b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}