{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648443373",
    "entityType": "User",
    "nonce": "0xf8db256d0c40d804bfbc6a2b579836583196b410929bf77b1af5570277a3a831",
    "signature": "0xf89cdedfad40c90b94203eab639d82c8d4efdc6caf64d43c46f29cbfa61f89e73361d4713c2222d6028461f61ebcaa5f51387aeafcad58fd9a1594d41d5c5a671b",
    "signer": "0x292eF57C1FAAc86008ab58D5116e0ba424C9189b",
    "userId": "721084704"
  }
}