{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "447853505",
    "entityType": "User",
    "nonce": "0xa6ca8e59ac7b741fd7d09115bffd598752dd6c23ebaf6c61211ae08aa356921f",
    "signature": "0x99f0809462173436f57a22acd15615daa14d120168f797b87d286168af5669a008d812c560151ad0f5edc3a754bbb14382176f78f402e9470e597c53163a13981b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}