{
  "manageEntity": {
    "action": "Save",
    "entityId": "1334397594",
    "entityType": "Track",
    "nonce": "0x3d59597ebd6def0df3a98270434b3ade05dbbc96758b30dfa711a156ec819608",
    "signature": "0x88e5bcab77b3e1bb54e8cb0dbe5973247f3469599a52acc4c92b0fcd94beb7063a0b95b6e2d6a4452ba17219e6febf1b41057ffef4d20becc2ca4000d2fcf4251c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}