{
  "manageEntity": {
    "action": "Save",
    "entityId": "1409857259",
    "entityType": "Track",
    "nonce": "1785337704734166763",
    "signature": "0xee44f62773d2e3ff503c4735226732a80d2b0a0173786e93d8f2bf27ddaee8b07c7bbbca0ed881bca6120f2177dba9392dffd49c3802951cf15e2412db3afb9a1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}