{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x65c8c199109ab7952bbc17143ae0067917ddb22e0ad663f69bcd457eca5ecb9e",
    "signature": "0xe521e4a5d2feaf7c7dd59979837853f186321767678567da494537e7204565ad26be36753a455b1dd39b5de9a6c3445bc0cbc55afdff563a8d0417c3f10662141b",
    "signer": "0xCa7cdC7D28D621f8e78105b8A9fC5a2752b42811",
    "userId": "958020941"
  }
}