{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x644336b9c0ad39d6bccafebb2f3ddc4049c1596e2123ac06e76ba67c346edc20",
    "signature": "0x62ec8acfa0401b26b5fb9bdf1b66378eaba631184ff0d11c77ec9bed8ba2c9523ae271c8aa4dd8abee1a4c1653c2a8df33e5da2dba47d0469f4b019cd3bf5c5e1c",
    "signer": "0x395d43CBcC7A0a5F939706B88e416c12D3965eA1",
    "userId": "780611607"
  }
}