{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7eabaa773bd33b5697f467aa8e5a806e10aa9bdca9ca148aa4f515260d61a6a6",
    "signature": "0x5ae9c463f4e11a3d818fed587db6b916b7e1573f371cb5bc4a1188bca9a405b06ccaf9759e473e088aa81b380121b025394ca6aad96032d7db371add34f215941b",
    "signer": "0x4C239CFb7078b5F3C79094701e28f9E2A9fC70A5",
    "userId": "337548568"
  }
}