{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "639977873",
    "entityType": "User",
    "nonce": "0x448e24b5a274622e0fe49f63f382f5fb4200ae5506004c6890b73e680f818dcd",
    "signature": "0x407c87cc65d786c458321949fbe7ec79f37d016cf999d82780a7b91832708bdc2b5250c1f15f1c881cb41d10a6f482f07a3df81ef490f37d3c914ec23ffce1bf1b",
    "signer": "0x57D64A47c0B6C0789D9565B3D90270Aea276eB11",
    "userId": "199258"
  }
}