{
  "manageEntity": {
    "action": "Update",
    "entityId": "305151012",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf759c2d334fd348521a25a2e7f815d0b41955db2b398f0f60c2c09302534768c",
    "signature": "0xe5b9b6f0623dd92bd87bd4ec67c65f8ab9fb59bc1fd1b9dee9a460a0aea12e2e1c20da58279dc40952cf340b38c2a434e8fa245b60c0100cb7afdcad921a98d11c",
    "signer": "0x643a7D01c8D4d435f9263d6dE2d6C2C3352e70ed",
    "userId": "305151012"
  }
}