{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304643654",
    "entityType": "User",
    "nonce": "0x3f94590db07464aac705845aaca0d21054d7ef973010b32786b0ceaebdd4b52c",
    "signature": "0x2dc470c58963ced71e4fc9e1112f2ec103d62a93b6f675de2b320e278cb76090486e554a7335b6c1b5e9f99ec5436fa55fcdada92e6b831fde766deddea8959c1b",
    "signer": "0xE9ace9823CC8eCc3Db431F523017dB88A0Db4738",
    "userId": "8472743"
  }
}