{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x604a4774f23bb204b71d9374902a9f48bf7aa359d3d08a558116be4eaa87fe59",
    "signature": "0x650770e5ea8818eef3ad9b5ff64e267e82576e0740bd17dae55d4dbae8950e8c7b155616f3cd753e9023028d33bb2a5c1edf8bd044ece814b5213847918111e31c",
    "signer": "0x297B472Ffc8Cc4eB6B874Cc0839bdeF088C018c2",
    "userId": "897537535"
  }
}