{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0x7b5b0a4735e7e7ddff2585f935cf1aa0129871fbe90e79c2efc89f0f4403d7b8",
    "signature": "0x520c92133f01116bf2da8b35ce6d52203f048a17a9328f88aaa64085f9e715876ba1c75075b94b19c9bb921189952fcb3a2aa473b155d2e1e823d2c5c5a4bfab1b",
    "signer": "0xbA5231da41B64fC270444f50999A73f927f23256",
    "userId": "28116771"
  }
}