{
  "manageEntity": {
    "action": "Save",
    "entityId": "1199702221",
    "entityType": "Track",
    "nonce": "0x7a5ff7a7524d2c66af120d6c014a625dd7ccaa966f2cf56d44ad8b5622638253",
    "signature": "0xe091b1c326fb49d21db37443cac2a83557ac9ab331ca403d9652ff4a29eb906f460a2cf698eb9b0955361286b33b963575ca128066303bc3d208fc98fe0cfd1d1c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}