{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc64335ad263f41c6f1c99b42fc410def31605bdae59972af172fc7d89cc914f2",
    "signature": "0x9f98c25544db394dc24b444f26ec6cf02b2e8149ccc76c3d49d904bc0d3b177f4c592ec2947ee05e00180bac7d5406b2b76306c0fa9eb53a944f10ff25674f481c",
    "signer": "0x4Ff77Da6D5C7286ea15F7F94FdCC04a641dE9a27",
    "userId": "512734349"
  }
}