{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xcce99940fe88f6f3cccbac46c30421681a6e4e3df0c65467745bdae6f452e343",
    "signature": "0xb04ebdaf35d4c9408a6f84c14caab1e107d8e1c5ac0605358e460da14e1e2ddb63bf6b5244174cec700dcc39aa30963bd420c3d82cdffe8f1332f9329c46a6e01b",
    "signer": "0xFa73ba11809C9c9D6c8BB53b602f03A3c9b75e80",
    "userId": "620123725"
  }
}