{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "235421",
    "entityType": "User",
    "nonce": "0x6db0204e376f01413d907823deb29f0b983d004e157eba30df148373ba2eaaad",
    "signature": "0xce9862c0145bf45e495e1f4f3c869dcdc0dad37f050737fa53f131c63945976a49eda5eb0afac6aa23291ac89ada20c817e04f228028ddf9f6234ec84fb92d101c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}