{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "590355419",
    "entityType": "User",
    "nonce": "0x71e78df41068f7ff7ec062d8db7cbf3661acfc176ba656c27093d40af5d2cbac",
    "signature": "0x6e90d54f5ff178a7b8efefff5891dd7612ffd51b1287ec9ab4f6fb8e6b768a087c80c17ee8293c31275334fa65c7457cc7daccc84a20c8c4750814495e8cfb281c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}