{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "464100900",
    "entityType": "User",
    "nonce": "0xc0f95c36254547e90da76e59461b44c7d0038939fb4aa0042d52c8cb86b2c543",
    "signature": "0x8349bad23dfdda91cd3ca08bfcd60e69a5222e7df1c3fd0e3ed4774954d4b3a664af9f7b32b941bede23850c00cb47d734922e07857945db8966cb5bbf78f3311c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}