{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508547804",
    "entityType": "User",
    "nonce": "0x3e4ebc415ee949445cb88feba66baf8e4391977177e4188387a4327a7dea7f37",
    "signature": "0xdd0165bfc96c247f17efef3148f803de41c112cf888ad469e3d39b4d1d7c66092b0d13b8e9192fc85bed8ec6775ebab46fbac8667eb3e8f0b3b157106fb381831c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}