{
  "manageEntity": {
    "action": "Save",
    "entityId": "1609113543",
    "entityType": "Track",
    "nonce": "0xeb5cd9df9c6dd94fb18a96491f2bff4ed5a96f4d05d102c68557c73f053b7690",
    "signature": "0x02d047a46851e9b14815b3db482e9c2ff6185952deca95541d7f6a2b1b319aca1635a7547217aff54428ad3a7891cf98d49b4a585b8b4797e5ced3985515befc1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}