{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "257420589",
    "entityType": "User",
    "nonce": "0xba128500c3ec029333623e39e9f2de934c3eb5c4e1bc8f7193e3e008fc33d16c",
    "signature": "0xa9b11743abc2d2c6f4b30847cf1d04c01232551bbdc974d3d680665ec4a7316839b40513d59954db0652e316ed784ab2b96a6ecf393e4525eca00b38e07db33d1c",
    "signer": "0x2F87bb373089af6C75e3362077A0E52A4779f72c",
    "userId": "582715056"
  }
}