{
  "manageEntity": {
    "action": "Save",
    "entityId": "1356539613",
    "entityType": "Track",
    "nonce": "0x6565bab3820a229e7d9c9cf7e022726813a08c7c698d1dc37626ad5dff966027",
    "signature": "0xe989e621d65afd698d11a183a36b8d25990380ffa2b12c89410cebf586ee33ff173482e731722fe770cfbdd9de0a139b0978c423d59bd870765b58bc123bb58b1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}