{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xdb01a0d71573c3503298551d352aada0d0c4525d7229a0c54fb5e0dabf7164fb",
    "signature": "0xe88cf89e2c20537fbbe0dd364dba12504e41640ce7a995cc353e47134f0f79d60ad1284b264eac56feb16ef5fb4cf17c1c541a6e99c8484041baf0b58ec2c9a91c",
    "signer": "0x31f113DAfe6A8b8032CaEa0Fd666C5Ea05E56332",
    "userId": "287310001"
  }
}