{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "140308221",
    "entityType": "User",
    "nonce": "0x5477c5c82e3c34a9f07620e1841cfc0a8a0530c4886b29fa9eed98af5170930a",
    "signature": "0x2c638469660906193515f30e0357725557c851bab11f8ad32e4fe3a9df2fa3ae64a1d998e535a36db6c9eaef3f0458efd5844d5fb06f634a7fd01f8b71bc66301c",
    "signer": "0xb3ec8D53b350D3Fae74A06a6023Fa66171B67E2c",
    "userId": "695620563"
  }
}