{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "755516",
    "entityType": "User",
    "nonce": "0x8c45a1b7ea932887d9b1d6f83da37c2cd4c049e0b80d146e103c1d77219ed78f",
    "signature": "0xb0ee236dce657d115d7cae50160dbf2d42b2b3e4be6aae98b1f443486b55cbcc1ec9b20e8ceaa8f657e7e6beeb5ae3229a2d106027c353e7c54d9deb4c5ba9fa1c",
    "signer": "0x75a075dd45bE38AA2c27754D97d5d84dD624FeA5",
    "userId": "451351"
  }
}