{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xdc4501bd6f7431611816c3eb3a416a7799d726b3ef3ad74bd3b272c5c731e9e9",
    "signature": "0x4d76ce1f2911504fe7851bd3a47d00613ebf642859e7c2c8b7922c2b799e7c5d46377d032e94e6400bc5fe56d7d8e26139c7bf732289950f5c2c8f2cdda3e4e91b",
    "signer": "0x000fDf1C4AbF420F755A036b16C19D32d65fAF09",
    "userId": "612358594"
  }
}