{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x20bb8ef6775fe8b9dbbb3125763637fd98a82779e93df3ab805aafc923a0e6b4",
    "signature": "0xe9fc1ff7d32cd0e9722c76d8459e1e32972e7599249007ce4e89a03e55e6a4610f40cadf31e074775cf9a1a27a9baf158cbea95a64a40e2a831884a0d82baf661b",
    "signer": "0xFD3B3ad6c8365DFBCf1dB1a67131B23bcB1aEA16",
    "userId": "56543560"
  }
}