{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa123adb4ab61ad083e8f7a43da8e341e38646aea3177dbfdd39846aad7642552",
    "signature": "0xf75915f7ebda80fb8fd72c25a2f713b21292bfb598b4d58b9d63e69393cdb71c0ca75fc421c69ba1635f127d5390ff124617ccd0b1e7f4ceee424c1b116b7f251c",
    "signer": "0x91A0243d0c4b44cB682cB60883cB72C26a8Eda55",
    "userId": "298293683"
  }
}