{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21640",
    "entityType": "User",
    "nonce": "0x5ac5fb1f1472113fafb080ee0cfb0a6a7ad686383f76a78dc41a19dafff20bee",
    "signature": "0x9a1015d22d6a131cf132d7ad08849070b8708817ed3b15dcada345d0ead7b14171a2c0408117d719e67f3041da92f58dc2d015f1072f0a476372f552deba49871b",
    "signer": "0x0e7e9e5ACbc336772430C8a71A6C4Ea9b6bC46A4",
    "userId": "423055172"
  }
}