{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x490ba3bca834770f95a81ad1326f8d5048742cd24ed8cc3e1efdbf91c9449ce1",
    "signature": "0xf42fc74e97cc82e1f3c2adda3f7d42b8d7e93c4c3c4a3638bdb385ba5e4f976863587f7d89690a1ac73c1fc39b57ea0df25aeb7bb93ca755140fb884b83450421b",
    "signer": "0xE372C5cAf3800d545f2A9827Fcc0852f286cfE3b",
    "userId": "724161420"
  }
}