{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x943c3cc36e8403df7a634b2d80194401510229a53fb3e791a182c5e04ef31a9e",
    "signature": "0xa6a9788ff3e5ac867729bda6c03870c26ed97c264a32063ab0c8505e0ee34de7005058f2542c23d2cf523b5ff293ad000b38cdd1e64c75e3ec8ac9d2b606c9981b",
    "signer": "0xc31f9899FEF55e657f6ED15531e6005A4550B476",
    "userId": "750516953"
  }
}