{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "903567804",
    "entityType": "User",
    "nonce": "0x6d672c8dfd3d9072e9843855ab9f3e1c0c8032f7708e90c633a208fcaf3ac28e",
    "signature": "0x6bffe36b1ab6b937225bc1ffdc65f49c05d2177695f1718e120f0693ab1e9f935b87bcf4e3e4607d20a08355b6b9f41bde42b808c8dbb4de5ca95cd93398dd581c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}