{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12728",
    "entityType": "User",
    "nonce": "0x479dc6bb605a57f96bbb50ca0a728c5a1dbc0f934b77859f1f1e71c3455d08d1",
    "signature": "0x9644681e593d910d391e958e23049cc9732638203809964206ecbd1cf4d124314d7c19d3da998e37ac48c69576187b06b7e9ab1510a81d01ed55b83d980684821b",
    "signer": "0x39332E1a558D399Cb3bc60291d8FBfEBcae76aF0",
    "userId": "664568012"
  }
}