{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51324",
    "entityType": "User",
    "nonce": "0x644a8a19dbda58aa0455523d6fd19450ca61d241d298dd22d666937e923b82c8",
    "signature": "0x50a43b12ac57c6f14456a32aea6683650d5a02c674dca8d2bff46d971b106d86302865222b85e3151976d6d112976137f313fb1abd427d76b686c15800926f591b",
    "signer": "0x3C7E367F0E6D1E6DD6De3c81817aE8C5fDf30607",
    "userId": "819845121"
  }
}