{
  "manageEntity": {
    "action": "Update",
    "entityId": "573903475",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe3d389c607f9f56f9e62f7d28d61bbe858cfec3a6e84bca7ec8732b51f9d9623",
    "signature": "0xb8b678792845e70ef6e47e910a8844a8cbd90eb7af638f9fb97a8187037676265927bd30fdab63ebe074ab3d9466513d0075a064e87db41ac1196b1677580de31b",
    "signer": "0xA565ED110cE2dA98A5F2A2a55687BB200F727CB9",
    "userId": "573903475"
  }
}