{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5291d34bbbb1b15bb90ba946667ecbddb6762b0aa7b41d6274ba830492c70300",
    "signature": "0xf900a55d542c0fee11387ef32df6e2568a983a84e0efcf2c6515de70a0af707e6adfafe5f03986fc78262d4ff75916dcfd30fccc604a799c7cc048bc5d4011031b",
    "signer": "0x8bd5c03298238332f393D0373090CA1b27A78DC1",
    "userId": "362760707"
  }
}