{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "423",
    "entityType": "User",
    "nonce": "0x5357863e185a7bad6f1412ab0f35ec732024d9c01e5382b790121670823b96fa",
    "signature": "0x74347764f910109f2ddd0b27a9349dc14fac15425675253dfbae987be5a646a23a39c81fa5db5f8308c378de53ba0b5ab27eecb4c1d3b8337b5a585ab1f531891c",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}