{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "751451",
    "entityType": "User",
    "nonce": "0x80e6d2067f3f8392768354abf1ce3ca5de2bf39af7b728e77db2792dc51363cf",
    "signature": "0x3c251c8e21dd1091ab1aa48de2ff7c9f14596d40f3acec990f5c4213980292ad4c9cf9a5797dba995e7a253545772efb70fcebabcb02050dc23875f72116decc1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}