{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0xff057f8a0e3b24a633575305b2bcb7ca94f332093ae8f7138065a9a598e74579",
    "signature": "0x511e2256d478273929492ed425c2668dd897ff118442e0d3d4eadecdf4a56b4044e450884a73e4d7c281c6d74564d26b5be8196a834f1d8ffb2ca59a109d11ed1c",
    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}