{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "197808111",
    "entityType": "User",
    "nonce": "0xc858a67e093ef17a5ea92238b9cff938cc4bbda114cc99c34f42de4cb44f3bbf",
    "signature": "0x284f61cec1419998a1f49621f011ffea747866461692e33d35b28341487721e9682ad4c4f589337ca8f8d27214801ae7776e2daec38e895006ed3a7f8978278d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}