{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1625f3304992b43fe274ff526bada0a711c0bc1e02bc75913c92d77d40beff1b",
    "signature": "0x6c5bf9a4be99c08457ca243b1e55546b87da5299a29020bf1f2b2099de42fed0178d44fc1046ae03b7bfccae4a9eedbc9c0495197d643ac01031826b9ad44f781b",
    "signer": "0x999B1738A12D7Eb90C4C637B94F93D70E79bf3A2",
    "userId": "764570642"
  }
}