{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "541339002",
    "entityType": "User",
    "nonce": "0x623a6454a4bb82497aa1f0ecd3985311f5de01197f60a37f87e7e6a10e723c53",
    "signature": "0x305e0bda3353230f64c802d50456fdfdbf0fc4dbb6702250a00ac7be8cce55eb00485fd0c1f8b6401bc62ec56bf97bbbde589d0f8dfe160e338b5fd425645d581c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}