{
  "manageEntity": {
    "action": "Update",
    "entityId": "505182311",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x92b15eea72d57c4eeee925856638deb01c783cae73063ec30e5485ce248265fa",
    "signature": "0x5a91c074d58716c0220fff223903529daf8f320db511c4839658c1b4b16ca3ef093eee6573bcedad52a9bb5cb9d2d51b0e3b80b8dd5f04a39551b7d37d02e5651b",
    "signer": "0xA819E5C5714510Db532e726DB8526f18026feA20",
    "userId": "505182311"
  }
}