{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "649816130",
    "entityType": "User",
    "nonce": "0xdb1589f5c609c10d43913dc0595b4e210daf4ec81e026b1cf1dc5975f76b494f",
    "signature": "0x4d9b965badc45e5e54b28d6183e1bb817d1c28503bc2b5c8b2360c1f2383f2005130899fd1fe12be5d66108a69d37e1aff877be2c17cd8edbed60b6892ea11091b",
    "signer": "0x49368dB15B9A78dF090195AD4338818bfA70C88A",
    "userId": "381576190"
  }
}