{
  "manageEntity": {
    "action": "Save",
    "entityId": "1706873919",
    "entityType": "Track",
    "nonce": "0x285319585e64fd53417e1f48593e7cadf4ce9779977d91fbc56f54ee79bfd693",
    "signature": "0xcac12826f3466d48aa6f3565f959ef127349e8330203ee983d064e14a05a93c352b5a543218ee002849c15be075b5de74110be44ca07474dbe0d1584c5081b571c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}