{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe9e80a1e690a84ebc31440fde75a525e4bb677d0613881769f91698afec2a3bd",
    "signature": "0x819f5b3d60c67d2769f59687347e4b4d9ee09bf4cc708214e361d3e6c155bbc71276427674398214e817d406925327a43624f20d7898a0828c7b9031004a4ccc1b",
    "signer": "0x5B9B4B3CD4CA9a7d10740977cE7702833B1407e1",
    "userId": "113810626"
  }
}