{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x33a4cda9d47b7547b73aa056994ce598a6b0994d4b75e6e79f1af9912b7125c4",
    "signature": "0xd53c498c0cffc01529035547c2c786ffb678164ef65d7b6e3418a9dfdf8bf69f26fd3b3d284bd0d639e2bbc2d5ab3019bfa19f2893df098b00dbc29be09098981c",
    "signer": "0xE99B6771100D63894452ae6eE05837583c2de6d5",
    "userId": "883691386"
  }
}