{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508186998",
    "entityType": "User",
    "nonce": "0x7c925f51f816715ba1dcfec37e3ac11874261e99f35462cda0953e881fdb69ea",
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    "signer": "0xB57F94Ef9a26d73E8b35D3f37FccD18BcC7eeE00",
    "userId": "850416615"
  }
}