{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf93b92ddc87ae1404f77465eb8f17776c8f889e8cd0f120a92e24ffad817c821",
    "signature": "0x77b60bfe3abf5c411ae481b67469794fb94f507b813bc6bbf1746efa8e4b466b4724a952e337d13fbf2b7c0d92e7b227f7f4e2055e52f154562f9d99715095a91b",
    "signer": "0x37e9863e7fFAE7Da617893D1BDae31713b96e94C",
    "userId": "989858939"
  }
}