{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0xb01c46bb6e9d81879e373afe2c631fa205f61cbae7518a2becf235b244a099f1",
    "signature": "0x737534f7e1d871a2ba359bc5bf10c9fcfc533abb704fa09a05e78c03ded3dbd651f1cdb258d6b78d48ceb37a278dc6b38750d6ff5ebf321d880d59518ac513081b",
    "signer": "0x168ff3b3F21912D4d676468A80Ee2af0E2F24a59",
    "userId": "124431641"
  }
}