{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843421708",
    "entityType": "User",
    "nonce": "0x707a9a9eae735c1321a528a9b1f27edcdc6865d942c19b26479e1a0a5ba64f73",
    "signature": "0x369fe545a3981a2578861d6bd5cbfffb53bc82421e38f656d2c8962e8d45e76c460dce36e176351b24bf5dbb7e25c66086c602932e7beba1883c97bca5996e871b",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}