{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "737872723",
    "entityType": "User",
    "nonce": "0xc99f7c0405f2c3f8bc58ef861b515bf1bcb1a13d3118566ef742b762b0cba009",
    "signature": "0xa8a1e6c2fd07da196edc28184247168d309fcfa3cde4d752c7a40a3e5892325552abc4a6e360626bb31e6a38796c3f45a719a7dd987842a24f750784595f7ee51c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}