{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x18e2113d30c23c2404772752c87ccc6a90813b8c9a907e1e1dcde25dd95fda48",
    "signature": "0xfb22ee73e4a2726a5bf4325b31ff48df4e03e2ebc8d6190484ed5c08e1a9b3a500445acbebee3d91346aaf26800b983a1dcce3e9d6d42f6fa1b98ba7f3e21f591b",
    "signer": "0xE8138E527B59Ab8BfE8a7FA47FF916b52B4dE327",
    "userId": "415404216"
  }
}