{
  "manageEntity": {
    "action": "Update",
    "entityId": "673809601",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xcf948cf961d8d7383a820d1a915f8ff7bf91909963c6d1d05161555b1a507c37",
    "signature": "0x961f140940672db1d87c667c395335fd1380c687f5d76de4b0f2c73396e1f5320ab01bb096b48e3d8bf66b596fbe2e3623460b178c481ed77006f75f5dff36361b",
    "signer": "0xE4D29728Bf83dbada6F79f9495a5c1a4d2830D4a",
    "userId": "673809601"
  }
}