{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1ede9914136aa15e69cc5989d31bfa06b7312fc39136221687ab8e06d928abb0",
    "signature": "0x67c27f7c69f749a9b48643f6ba49ffae9fafa67cc6615310e0afd0f0a1107fb76515a8b5b146d6dffe243ad3ec7f33d92aca88fc7d23b607a2829ab95e4e5c0a1c",
    "signer": "0x4e81B620832b54ecDd7128c36F64d12cB4626daB",
    "userId": "121579201"
  }
}