{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x11ed4b0bdea4952bf74c54774acfe78ce802ddf7c0ddf93b4f6d0aec87fee8f7",
    "signature": "0x7ca873739a35c53c10730801d9772c7a9edf6f1385f404570f335e51afa2110d110959269eeaf38a0f1b4214d2a8f9b5c7db8a0d7f4abec21c411d08f88f7a7b1c",
    "signer": "0xF022326ea73C1725c43ec5D3F54397C1c3726B08",
    "userId": "141115321"
  }
}