{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "306102391",
    "entityType": "User",
    "nonce": "0x4e3016f7fa687c8f4816cc9f93f989dc687d21d810f14dad7b55ad16dfbbacc6",
    "signature": "0x78155c436501dad9b3d070edab0f00056434dc25fd11cfa4172399680d01cf2171f16eb1fa9bb4ef30ff890278bb3bc06d512237b61c7e2b1537880266bc7cdc1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}