{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359330143",
    "entityType": "Track",
    "nonce": "1786880767873415402",
    "signature": "0x36ec43faeb80520d617e066adca5ff9d43032b15b586aa5e37cc0bb656fcad254c183b8f416c567056d1b8b71e91d921a20d236484c31a8ab1e06d6b339ab2321b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}