{
  "manageEntity": {
    "action": "Save",
    "entityId": "1051757784",
    "entityType": "Track",
    "nonce": "0x8a7f8011619c0700f995b909243cd9e2d76aafcea14045576d34d91554adb772",
    "signature": "0xcdcd2b8fd34358ead8ae007aaf43cc02d544661d06b8c4da0eddb3bab9beaa087f5151401043ff3f85778f4cb86fbe8a5c9754f6f7aa9f70260afb6b7f5d36581b",
    "signer": "0xe56da5Fb5AAF30449E9e91827cc7A25B4EA876C0",
    "userId": "399987850"
  }
}