{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "354535",
    "entityType": "User",
    "nonce": "0xc8d054d0173a132a19b84211607ca6377b8e9c05e7671f25da5f22a052144c3e",
    "signature": "0xfee9a1c01c6e8ff1be719831c1769ee990b4af31788be56be9e1618840c0d6bf3cd1a2fe67b2c4872b222a6a5067a44992886c7d56590e00f696f435479abd8a1b",
    "signer": "0x20a821B898F6Cb6BB0E5FB2460eD4225B40Bd68D",
    "userId": "198400104"
  }
}