{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "339350040",
    "entityType": "User",
    "nonce": "0x907a774581457986e4b0c70e1701d23b782ad83c4cb806bbfb65131ee4db57ce",
    "signature": "0x3cb64f6480468f6885e0965fbb7cd1cb6d41193b61b8b0988e446810e466e7c50c5e26e51b4e4bd4885c59a1ba603455bffc456a3f3e3ed10c32e9e68d4c4f6e1c",
    "signer": "0x59b2AdB5457e737F50672cfd7783475958BA125c",
    "userId": "663695959"
  }
}