{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb2c424e983f9c55541c8e30d7971efc3583e97c202601fbddf5cd8d481503a5b",
    "signature": "0x49c38e7c0be9a1aa20a1380d5a3f3b93cf64af2cceed7f6bda29a8f9fb89a90561df3ff7c02b63048a2cce08f7d7b1c054daad2b4a36db3f352f57e2f07c9abe1b",
    "signer": "0x51E08E74E29DCd09DdEeF4713C607E308bcD0411",
    "userId": "123102876"
  }
}