{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303386",
    "entityType": "User",
    "nonce": "0x30fdb09e8ff09d5271b6201dbd2607d70434da7238aea2bb3cca12b6aeba6524",
    "signature": "0xdf4cf981088421104110f4fb5e24237e6480f6f3bba8eecace367ba8db884efe5d4901c902c6e5e768995e1d810309fe8e8fc362eaf13febf63c9a599d908d891b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}