{
  "manageEntity": {
    "action": "Save",
    "entityId": "1635662114",
    "entityType": "Track",
    "nonce": "0x3621d3e8255e27d3e2c0e004f4a1bfc2598c5fa394fff8108778c40d9a4d10e2",
    "signature": "0x94fe97d65265d370d2cf379c52c006ce29be36d0410024b3505a3b1565bf9277437bd6b9d9b3260ca953a4afb7dcc6f4c9e1a257398d93593100a50ea53caab91c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}