{
  "manageEntity": {
    "action": "Save",
    "entityId": "423192768",
    "entityType": "Track",
    "nonce": "0x84123f4a4a37ddde04b072ade5aaa9bef5fe5e886c3ced9fbd64fb04264262eb",
    "signature": "0xf8381504d25d5e441070f54c4153802c6ebe148c96cd292297314bb728d0c055080241ac834df9b0656955c7f75b0722a1c6e4fafa02aa7eb5bad410531104881c",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}