{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "812568944",
    "entityType": "User",
    "nonce": "0xe719adae5e353faddbb4bd1a79c10ba86bc447f5aa111d138fe96b76d3d70be0",
    "signature": "0xc25a674829ab98afc7015eee7a57c921ebaddc5dab35499bb901606abbbaf9501571ae5477ae9aa60bedb8588c6f1fd54e1476913f3637afea5d9dd1a8e215601b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}