{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1801d56ef210daccb74798c9bcdcec97c30b336d867851bdb6e14b6a8189f695",
    "signature": "0xb51618c365927d006038a831cf5bc0ca4a24671303f36d36187f675c496028a03ff7e713d560e5d175d328261c75148be2e05e5a888fa8c0f69b9777e1277cdc1c",
    "signer": "0xC5d18b553bBB15AF66038908A658cA6d2A61438E",
    "userId": "603509540"
  }
}