{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8cea4316ee6ed73cef797177d6ffcd73e87f6c06c621105efb01061710a25067",
    "signature": "0x6927b22bc011ecb487bdae36f25760ef67c2d84614564375e0cb55b14a23c97e007b2177ff18379b1933dcf601a303f28d6cc6b6f6846e7ff77ecad227cea2491c",
    "signer": "0xB9fD1D12505d407d5Cf71027010F76542d156E70",
    "userId": "980975771"
  }
}