{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa3663a6b5ab7d3834ec7b0c0d0eb0f61b94d748fd4a894d5d3c9d9c3fd8d811e",
    "signature": "0xea37d170b0d83351802b59184f68bd7558a7238a18b4d62705600b4ed9fc20ff4f2b2765861fe8146ed3c2f327eaf8fbdef63011d8749e6bc6bd743d93877f071c",
    "signer": "0x8103D5e9c3f9Ab21620BC430d56a4aC96262d36C",
    "userId": "404887599"
  }
}