{
  "manageEntity": {
    "action": "Update",
    "entityId": "223452788",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x50bd5b4e5ce92d17544082dd75f4db6a32800f49895d5af2162ab64b393d1e87",
    "signature": "0xdfa8f6abf1f18e50f851acc76037073dced4a5ade368dd8286700b0af96d4999054145dbc0c185bf104dcfa7ed0f33d1e322c0ec33c4da67ea1291f415713b401b",
    "signer": "0xb403F463a3BA5FA5381335034AB1a0F185E15b8F",
    "userId": "223452788"
  }
}