{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x40fecd6bf4f75f06fba3e2445ec75268f8687e9bc2d50492d00ea078a6066211",
    "signature": "0x461e23272a014ac3c544b78fc072416ef97bd6ec0ff1e06e05a145b954ced98b7a429fcd656b6b747a0a97dac9e803ccb32c742ed3a802f98f978780abdee6041c",
    "signer": "0x51843b81e52AA38ce1739CE5065D090d52d383b8",
    "userId": "817991583"
  }
}