{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xdff83ea6baa9708e16f8f21760e3707ac0a8051feb3b83dec3716913220652c2",
    "signature": "0xf7538f013fdbda9cb404ee06d88aa2558329fe215b66ae225b475439cae6f5ab0668f858ff701d6b6bbd8771be4516f40af60e3286d9d1fcd00553e416835a851b",
    "signer": "0x723381eD168292Ff98fDA13b4424Bd1845eA0C86",
    "userId": "365550737"
  }
}