{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4eb21ba0ed6cab5ee6698ef372be57a7830f678e622a56c9847214d1d92f7c4f",
    "signature": "0x9d621e63f632786e8d59c76cfe73c7ad145bc2ab4b9992735a7b3cec94c7b4c47127de130624303caee4f5cbab8e6403ecb6ee020395a53db726f99acbea1fc21c",
    "signer": "0xde399414521e9f416f405b63b97D0be4Bf7eB8b4",
    "userId": "459634667"
  }
}