{
  "manageEntity": {
    "action": "Update",
    "entityId": "221578791",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xcdac643a7f72c49ac15cc26f06d3af50f06f2f15e7eda9630cbc2dc6435e21c9",
    "signature": "0x324a957c94ea2a17682b81562eaaa28623a7fa38a3ad93ccdebe8a0fb3b22e8f690dfe0f76eca63bae144f4e7f6f196c79cdd6ee94ba8af71814c12562ef12cc1b",
    "signer": "0x9df061dd96b69d4eaefF4BD0925958DA09Fea19a",
    "userId": "221578791"
  }
}