{
  "manageEntity": {
    "action": "Update",
    "entityId": "256606542",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x198a70afc025c0bb844458da28f026a35abc42658ffea0705b19365429739781",
    "signature": "0x12006841175648360889b5e235b70fe983458f679e2cd6e23e5fb932d81474341be0f98faf1a4ecc24b93ee560b526d3095081077e7772791e733dc24cb85c4a1b",
    "signer": "0xD04A0ed5A059A43F54219DFa892ed814587D533e",
    "userId": "256606542"
  }
}