{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd55b4553ef08944519a00a2e2e92a680553aa662cae9251c89ca051979d39395",
    "signature": "0xaf7c3922d7b53cb6f63cbf1ac16a4f3363c4b7581991ae9d3282f88b79ff23e37adebb819e4f98b0e77fdae57b71a20700c9ff51aaf4236f3d5fc622b468b0ac1c",
    "signer": "0xe87eed0C8d8FbCAA2a72D979B3D0FAf994963f5c",
    "userId": "19600037"
  }
}