{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4d97e96beef0af13cd445760c521b147f74b05a8d80b24b8527af6e6d92c23c3",
    "signature": "0x7d5c502c9f5806a7a94c0f9c74910cb26ac6b62fc586c971ec4dc4b0c3de092d1df5b4ab5a33080c6c7f16f833e031383fd6d6887078e80fedfc6a017c8b94d01c",
    "signer": "0x520Ca5f597934BC015b2e083dd3a64CEc78eAc67",
    "userId": "319359780"
  }
}