{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x981929acba568855c0c92791636b979b9152472bdb929c9e74773a9142f15f75",
    "signature": "0xacb5c70d882a2f4c89f448d42ff0d34ebc3db0cc4977647c5a564c67f49ce46f57cccc9bfb8d61b14dddb2501f4d1d3443cc6a1a407ee7ee988f6f868eabbba51b",
    "signer": "0x9587E54fD9e50A63472e59359F08eFD8F011cc70",
    "userId": "583511607"
  }
}