{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18918",
    "entityType": "User",
    "nonce": "0xb1d4df8f7a6465445b5c0f8c1107f5b9be8e7b78561a94e648b62c0522fdbd60",
    "signature": "0xf104e85f1ea52a1011449a5295da5df868ac650d352cf2a17c2f7f29bdcc6cb81bb1b5a04861442698dfcb509c2aaf8cfc5fbbd4585d8e2f9c51c47bfa25779e1c",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}