{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xcc4e6968f10b498fd844ffedd76cd60e927d75adef1738a8f66c1f7c04c7ca24",
    "signature": "0xf4ff1fed07219449cffba74e9ea20ba34d9e5ba1f07bb42720aa50a233e905d47f3afbdf600858a19b8d3dd15bcfaaa832ae9e278c65d4f5b17bded7a0ba234a1c",
    "signer": "0x37df5cB5691fb1e7c1E5Ea486F0C2FA532a6c2Bb",
    "userId": "959312700"
  }
}