{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf9d91c5986c2b13436b5582564a82acd06b7c81b730f86dccb6d748f1495b5c1",
    "signature": "0xe4e2368e8e2862ef8744f309f8645638a0a0b36813869f4119b6e69de6448adb6d582819a07c890904762de081fd7dc86c82f5763c8b30e0f7e53b6abae130931c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}