{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x73228c079519387d67ab4a34398fb8812db392cf9dfe00b1d56d033ea075017e",
    "signature": "0xa009d1323c62032552bac2bbf8f313682c17197b4b5223e4c74d43ac9841384140556d45ea3f2ce89d52b5230e1b8bd740ebf6c33b612b260e320105e05631441b",
    "signer": "0xA9012b628a5Bed1406f97647fc6Be02eC3BF75b1",
    "userId": "141875639"
  }
}