{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "520365335",
    "entityType": "User",
    "nonce": "0x54b1f2427fbdabe100d9d5bd3efdf9f1ccbb55e0e25c5408bb100b024e99f682",
    "signature": "0xef556d43390182bf2e4735bb89364bec1dbabbf1e0a49bc42f67e0423a52aa546bb29412872de73b4ef2c97df520c63d7d07a4cb87f8c5c6564e7608cdf8d88c1b",
    "signer": "0x243f92B83d056f818b9b95664A8B7A86805A3E71",
    "userId": "111448"
  }
}