{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121018469",
    "entityType": "User",
    "nonce": "0x1ad68939e509c120d07d5bbc7d1403a60fbc81dde07953049cd4970247dc5937",
    "signature": "0x3e2189fadf8eeaccbb2ee0aab016736f3d4ce2ec330cf7efc44381234955ffcf26173dd0969424ffc2579911dd36dd037237288f3c96c8f038572fb38d26a7491c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}