{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "837777538",
    "entityType": "User",
    "nonce": "0x1a891427bd8d352e247466f4e849532557317cc2f70961264afd7fc043f0e60e",
    "signature": "0xe55849a64087aa4238eddbf32d0450733ce37a5b9bf6679bf3473ea7b2a64a886d1723d1a508dba89a79d94f9dba7a26b1eca5f8efcc82b5927d3469014cdf251c",
    "signer": "0xA5594f75935B53086a8f3231b314C131605FEDA6",
    "userId": "140185425"
  }
}