{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0xe1ec5847525aeea5d67a520e954172f33d82b9a32c985cafa462c8a9be38b251",
    "signature": "0xfd5a5dc9ccb8d3c9facd9a74dc93d0f6e7c8228733a728ab2db257675045c4611015ebd18aab5d90ecbbbd74edbf5ba6a2757eef4221f76eb15be402143294c21b",
    "signer": "0x7cb443E1D882339Ce2Db89944ef44929E8E2F578",
    "userId": "343301"
  }
}