{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "305838",
    "entityType": "User",
    "nonce": "0x3c800f70cb66fdc40c8b261b7f9002ed8d9f89b1f413a2039907c1188f826b69",
    "signature": "0xa5813e74cc95eb8fd31629a341c95e430b7c2879f56280472709776428dccb645acfafdfecefc40077a28d858433179a08f410ab044aa0989f33a95939c851631c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}