{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5212b1083bac0e2d134e340de2be46f4ee505b2c800bf1e6593dd7af0a4b8123",
    "signature": "0x991356e455a338c13f4fbd72354fc4bad050141264da08fdd0e9cc4735481cd9764abab04c184732bbe46480fe44e2eddfdc0ab1d1fb8dec0be76c0e425e2c181c",
    "signer": "0x875B2817981A98b3c096D69b3917097032fabb1B",
    "userId": "817250868"
  }
}