{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x51a91b7db0908013233a6bf9dc7dde6e6cb55bf8aa4a777a83c2b3b012aae6e9",
    "signature": "0xb6bfb616016776981998e881c130478923bbe09b2f24439cf9d81b2e80b419894acba673285ea69361e6665b6b55b59da849bea39868b119673bcaca80ea9def1b",
    "signer": "0x87e4380306024d22309CBb70efB443AC8aE372Fa",
    "userId": "308100838"
  }
}