{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "871324932",
    "entityType": "User",
    "nonce": "0x5947efaf8167b50c9fe02692e1bf0565538cfa93faa5162c7733e21b83f80e30",
    "signature": "0x1857a7d32c8e6fc3a97e4bb2a1700abd014cab7e9b44d738e67b902138c92c6a4f7bfcb9b6afdc00b2b81f8abd63e9981280fac3dbba01a7411d280f3da96cf41c",
    "signer": "0x4ad870a0C318214b4796d1464BC8Dc57C6b84C12",
    "userId": "408505072"
  }
}