{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "409647715",
    "entityType": "User",
    "nonce": "0x5f334131e7ed37f930236b4c17e33af5df28b7b4c5297066a65582a2fec0902d",
    "signature": "0x5431f1eb3bbca12d762f96fcec5c7f71bf23b7980d70e9d1da43127ae09fdaca5d9cc3f2ea424d651ad1713935213a83cf36fc63e0b990ab8151cdc7398730871b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}