{
  "manageEntity": {
    "action": "Save",
    "entityId": "876634224",
    "entityType": "Track",
    "nonce": "0x2016ce032242c85da1ce7eeb1377a03679527a37f3b9a88872b7b21e3896d08b",
    "signature": "0xbe6fd90a92d36bad044bc5d36fb2f0d0fae93ede812489b6a98d03960147ef8b093ebb41044e826789fcd21d7362f6a5adcbed9c1fed948235c59703ffef1f0a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}