{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "542041690",
    "entityType": "User",
    "nonce": "0xe0a9ecea281597a0897b76cede3eaeb35302c3605b838e7c7fd8da73c2006b30",
    "signature": "0xef11af32862b07746cdae4c176d0c946e99cd28ec24775cf56dcc8901ef67688190b8e4e7df18cae591b7e0aebe286e9c06d313604e5bd118424300b25d936b01b",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}