{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "646673",
    "entityType": "User",
    "nonce": "0x7983d5262eb576aa54bbc9764189c87f40d4845acf1be5750bd2239ee7ae8225",
    "signature": "0x6a05e7fece85504c52cd7c472c246a3db812a6ada29a29bb7c9eed74f03ab46936576af57f158f492d53a9f697c5030b7a622c342425432af54913e0f9c08dd21b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}