{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "883736280",
    "entityType": "User",
    "nonce": "0x5dd4f540b97fe8de39ec5b3e1c7f874224dd4cd470024b93003d22089866afec",
    "signature": "0x08e20fa48970b52067a42df0999362615fae4801381953150cfdb37c663dfa333e2131a43f6fa787140a000aab3910fae87d5c85c4005784f60540300e17a0581b",
    "signer": "0xF66719AC0E8463f8c9660B4412B4972e1dB48183",
    "userId": "57021"
  }
}