{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xe9fda2de4c7163af1944c28ecbfa563e40b0436a16960a622fd7ca800cdf9cb8",
    "signature": "0xf6ab6439f24257100199554a3453081bcd4b35f8b9051ab98f767a5e073af7bd4af7c6416946d2097677db3784a8487957d6ba63d9d2724b740e07e804333c021b",
    "signer": "0xa603e9487Ed7C3C62E8acb85f8f32acFf5d6349b",
    "userId": "278135553"
  }
}