{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x01fd4db2b5e5acdde004eb7e9ef3a9621da041b7906f0eafd85c2da6840cb2c1",
    "signature": "0x543ac218249c1ddf7e4813d5093f76ac99e265ec3bd01408af83f83a4cb4e9ea602c2ebfbf15b5179fbf043b61141e2f44e1e1ccf0562cf768173e7d7a0b2f081b",
    "signer": "0x3AD9866ABB703054AbA8A6d2C3B5B0c43298b8Fa",
    "userId": "332835606"
  }
}