{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "298957",
    "entityType": "User",
    "nonce": "0x8815b2107b047accdac02027b1c21927518eecb8daf45401b30657bff31e0f82",
    "signature": "0xe115b2c395ec2441ad2122140fbbfd8e7e582a250175511ec2e49692da021eee079472fd157fdc21dfbb0d74033dde68acdda74e73c346e79d4561ebc5e249b91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}