{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307",
    "entityType": "User",
    "nonce": "0xa5546ca87d8758426c43435a2340c099573420b7fb0ca4451dd575342ac9b15a",
    "signature": "0x61fd7e29fc74db1b8c95c0dddeec2a6d3101ba2c431558ecca9bdfe20806cb2b6ca8fcce5877f42ad85ba6c9c57d716ac685bd039fdbc0bce309084d581c5f3a1c",
    "signer": "0xf9Bf82B2ecB609ee37250F00C0835d529331385D",
    "userId": "654530894"
  }
}