{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "764248678",
    "entityType": "User",
    "nonce": "0xb56341827b675a9943d57a2cc3e6b3ecb4a5fcf8e3a21aafae34bcdc018cf2e7",
    "signature": "0xef8c9082bc67b7729bad0c6d6184e22af92e5a7a1a6f5d34d83ff4a3d34d76af2f0afd933758d984dd35edc45c843051d36da9a7896a35ba3040dbc2585096701c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}