{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "350389",
    "entityType": "User",
    "nonce": "0x615ff8129dff8852a59815c4c1e8a942daa140be64933102c7aeac4c9ee0de83",
    "signature": "0x76ac7e043dd581f2597448079a75da6dea46bee6c14fc25626d464ea984f8c66055fc8c70c90c53343a77c76bce3c70f5dc792cc3fb6475e54128789f319b3801c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}