{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3557",
    "entityType": "User",
    "nonce": "0xccede3ba72cbf8fb4918a4bf22e1478cf95b6535eda13193cdefdf920faee6b9",
    "signature": "0x1bc606fa4da9f92d0a848f5d8b530f35bdf41353cf8b4cceb6f921c0961ce08f5dc321e1e466b9db3f05e60af88d7c4631e52fc503e57b123b87d03e63f0edec1c",
    "signer": "0x22755B2d72c0de00840F2A791184AFDAeF46deA9",
    "userId": "642307805"
  }
}