{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "815984668",
    "entityType": "User",
    "nonce": "0x18fc02dcc241cfa77c5f71bceb5758a4f2dadd10412ed34a6ad34309abb0ff61",
    "signature": "0xaf9d3eaa59af4c07ce0b388fcadfa3b8eb62f163682eecb85b67984efbd9431825d15f1e55795fdbafc8e0c12869d379e41ae082a5af2d227d672359733b00491c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}