{
  "manageEntity": {
    "action": "Update",
    "entityId": "395188301",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb48b6b4e55cb985f35537ee712423ddf6dd62294e72c4ae8a8a4bda78ff337f4",
    "signature": "0x3a9cc81db4700d8b9ae725c3a4e9c1c4860e7a1b67a0eab984b38c723191921703138970a83b12a6991cb3ae3fff6da0de50d2e6db99a6f57a33bdb6c8529b2b1c",
    "signer": "0x766163A0b3d955a3C5B4e2F3b4a1542d26f47207",
    "userId": "395188301"
  }
}