{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8d1d033da66e87eb04a28b8d1cc28b90510bb76d4ddd27694bf83ed1333f65b1",
    "signature": "0xf2a450c425eef74a88d4e95e3f498fb3691a89beed0442e4235d594677f9fd0f34b9d124eedf4d770e9d51bd867674d2647613e76286e41490f1d0cd5198e47e1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}