{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb4edc6c928654b8391a9935afd6b73a6ba874065a4e41d8d267122e04945f776",
    "signature": "0x0a05990f5022e49dcd7a2bd9f6d734b08ca0d2380285d652209caa846bec0b263f861215d829e66a59aadebec051f0585d1ca7ae5bcd3e1e2fcffbc2d8c3c66e1b",
    "signer": "0x66f062Ac16BC551210BF257Cf0c662C1cF0eD1cd",
    "userId": "123516504"
  }
}