{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "708313645",
    "entityType": "User",
    "nonce": "0x881b649f6573ec9f9c24f9ac322e66fb2a0f743aa8aaa66445fb10503043e4b2",
    "signature": "0x20b853dfa8328cbbd6451f139d2c7205e82eb88138e9e0688187dbbebf0899fa38203c39bc0f4c74d9c910eb6bc53220863d9c5a95c394ab2395df4d4f196f491c",
    "signer": "0xE4EF593fb5D21ecF6B00BbBB006Eb9725F5F7a5A",
    "userId": "852971520"
  }
}