{
  "manageEntity": {
    "action": "Update",
    "entityId": "973001710",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xdf3ade5cb6af7acb3c2e41652f2d7e459f2dde3e67d0ff72610b44012cf708ae",
    "signature": "0x75db90212a5c7c000af14755255569f8b21136c8f394fa95b447c1f94a7bcb055ffb4815384fdc179b2e3de4e5ea9fd5e20d308b7adb390973d7bb2ce76942b91b",
    "signer": "0x687Ca5f210a68254CCF5A7F00296C1842f754841",
    "userId": "973001710"
  }
}