{
  "manageEntity": {
    "action": "Save",
    "entityId": "163493",
    "entityType": "Track",
    "nonce": "0x68c2a8d6e536486fc51a79cfcef31792df9c116e06089d14602ec8cc2d6a9765",
    "signature": "0x5a84668c2b255a7d8933dfc5e374a1bb05d93487cf68a34c0a19102e0a154131419411d055f90e5d9e8b7d5a6f7d0f937267bc905483daa643aa9cca693e28091c",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}