{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "199857",
    "entityType": "User",
    "nonce": "0x5efd6d874f6ddfc66d3482ed202d50373085534fe44f17978e3d8c57ee8758ad",
    "signature": "0x2409ade80c25e4bb3414172b19e93ac6b79dbc766b1d3092cc28187750a02c84452b8ff8092d3792c1017df772a6f87f343f157109927a53b80ce0ba97e75f861c",
    "signer": "0x1974AE10F43B771aFde6EE8a8C09eDD82B207DaD",
    "userId": "917580161"
  }
}