{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "273656260",
    "entityType": "User",
    "nonce": "0x60910db50f21466c29617ee28a836cf5720d8d546929c40ead8dc32d66dd16de",
    "signature": "0x101b40b3344e47dd5817a7f99fa66e2da3c00600be316dcffa6e1b972426cc5544c94c50995c0d78738c71bf607e6c4dbe64f9ca59322f6c0950a07427207b321c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}