{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xaee3d52c6bbf48c9f59ebf9ed8da014943369f20425013c341e6831b19784e44",
    "signature": "0xdd2e9bb6abf0868c307dc283b1b8aae1f80469f729ea8906f007b1e04a68bbe70c77f1383e474866eed604ca0db2e9fe1ff7a0cb122f3603c7a83c2d32a194b91b",
    "signer": "0xfDB135c6576F4c2f11DAb7Fc81d12eB18c594598",
    "userId": "750592366"
  }
}