{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "545584",
    "entityType": "User",
    "nonce": "0xf9734b4b0dfe1ac7a06660fa0a3e93e50783367461965b1bdbe3105104392eda",
    "signature": "0x02ffa28fcb9ce06951b347ce6deea11dc99995db29c853881b33750f8b2b769b110f9784313d6ce5acf44ea9140293534558221038686c396066f7f5d303e7441c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}