{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "309421",
    "entityType": "User",
    "nonce": "0x4fc084792ef8ed1f437cf1f5a8a9fe1f52e291705c223ea9ccb5781a9a2b29d9",
    "signature": "0x50383799bcf50aab948cecf3f961fc48e4e65b4873cf1015377d9f958603776d2289e0d6cf44993e6978e841c450dbea9daaf9ad06e8a49c37878453ca87c0601c",
    "signer": "0x90d627796C9E2071AAd9F8C20f6dCE95587F6d13",
    "userId": "560619378"
  }
}