{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "741417198",
    "entityType": "User",
    "nonce": "0xbd8398cd58af02c57ba77ff3a4020b3ca2bfeac8e7e126f12c4a830a759513ff",
    "signature": "0xa35800c324a2f5ee1e03b8083680bf2655c346beb6c9e88fa83516f02b4294a12c2310eb88e8bf754d79a47b89aece4fc55a5a0f7cc12f71f1a13966206837311c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}