{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "7498",
    "entityType": "User",
    "nonce": "0xd594b530f8d9aa024af0847960595f37d453f42dd471f6aeb6b98af25a5b2adb",
    "signature": "0x674a257eed5d470c3c029c3e8229ed91a34475c58f777d383dd231048def815a1688a9d251dba9b8c935295ed5c731abd0528da3a1c78985b78c789985c2b44c1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}