{
  "manageEntity": {
    "action": "Save",
    "entityId": "1356014503",
    "entityType": "Track",
    "nonce": "1786277563958877982",
    "signature": "0x2ae29ab11d9971cfa48688c7d25e12b8c91779e4e734bfd4ca5299b44b9c3a7f12530f2e9fcb004d8b4d2bd01c72a461ef8a09a1e7b7e7019a82bacfa30b7f6e1c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}