{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5750c2a83e6dea69296e3d6bc1d7fb11daa11f9bc351f5717b186de951c6a952",
    "signature": "0xf452f060ad4c65e423a133a2a3465bbe060b287c4c7f721f4d2d90cdce40e39f38e26b59c152e1c6b629f8700ffa443f34a95dc1ef975b200ae1f6cd445f71ca1b",
    "signer": "0x9b682c779356138D1D188CAB373b0F44a2d43d09",
    "userId": "512022848"
  }
}