{
  "manageEntity": {
    "action": "Save",
    "entityId": "1199643279",
    "entityType": "Track",
    "nonce": "0x06e7774fbdffe0184c7e381258f2178a8be2381d560c1bbe657eff816098cf7b",
    "signature": "0x856793f59621964e5a2cd1848602063d9b95b8aea8d645f97eac19692bb0b94747d38559b39a2819d89633cacfcdeaa4af8ddab9d17219f2d903b68aeda0425a1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}