{
  "manageEntity": {
    "action": "Update",
    "entityId": "751343381",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x120d624cfa8bc2b1e0ef12fafbf35d68fb58486d4d1680e63584b254702d3045",
    "signature": "0x1e8e95321ae17482569a2bce38c72190139b898dd0ec71b5f463fb92408999077417d1a7e466e60c28bffe17172a45639a152736a4f4a86ab5f7494a26c4e45a1b",
    "signer": "0x1BC7c7b3915C240F7C6acf2a48c207Eba46D5De0",
    "userId": "751343381"
  }
}