{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508547804",
    "entityType": "User",
    "nonce": "0x6c0c6f706c188bcf4d08ed0320c52071cf65995d7f79807cd1dd21e075b55fcf",
    "signature": "0x7e9ea4cc86a87313d98cc4f1cc5892c5fc3dbc429a49c2c05edac4a38e60e57f5eb0f0040508cf437ecbdd9a0403cc008529f39d7ed6b92fd89599e15e8692a81b",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}