{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x878c3924af9056f060f5c109de91b6b265716aa90010e7ba83d7437256cbe121",
    "signature": "0x159cfa4cb1afd1a91d5526ef2c24da5c48ae410ec9318a38e5985d58eaad8e3c7ec10e0aa68076dcdcc4b8eb4f2bd5b90e59a5374534f833ff373c2b0f6575ca1b",
    "signer": "0x7964a5eF7E9a780013d3886B40ca04443D69588D",
    "userId": "224019652"
  }
}