{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x43120c0867e6bc542406f96bd91150aae08f708f79b8bfb01566c7b51de647e8",
    "signature": "0x375a78554c6e33b13952a01832cd3c7444e04777f0b07fddeaf7b9c6b17e74bf3182f9c29eb66e30c7dad9c49beaf5a3eec58e502070fe853f79d82fd3ac2b401c",
    "signer": "0x2E3D9aC23fE667Dff8A99973ab487B6033F6A239",
    "userId": "416324350"
  }
}