{
  "manageEntity": {
    "action": "Update",
    "entityId": "375695199",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8ff43226bbbf8e91b8d6bbb39ee557bf6cbf5639d5e054800519e5d35d114323",
    "signature": "0x0510bec39545faa78f552aea907389a0c7dfc45cd7602d233af8c0f3e10ee89c27c8c1097e32c4ef3f2b9437107d773ea7fca35802a6e0da99c975f12e726ba71c",
    "signer": "0xFA1eda14A6a62810B46791435B5eb917C6cC0f0a",
    "userId": "375695199"
  }
}