{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200080308",
    "entityType": "User",
    "nonce": "0xdd6844d2c1493894eb78efb19c6c71ccffb54891ec271805c69f9e0e1b2924a1",
    "signature": "0x2e3df012f8202a676c77506dfd841dd554643812f4d0576ca533271df774fc19650bd4c47a53ab010484373122dfdadbd7cd5fe8f37f33886f3ec4a2e7c50f881c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}