{
  "manageEntity": {
    "action": "Update",
    "entityId": "505182311",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x66778a1ca7ff32338fa29f182421034f6de1ae7f0cb948702bc4529f88950822",
    "signature": "0xd1939cbad7d9e6a1e5615a3d1e7e53174fd5555aefcb6d895fb5a77e468fca811359087ae4c2d612901c0c73e7b314da1b7322ac2d6a27b910dad5e787424c541c",
    "signer": "0xA819E5C5714510Db532e726DB8526f18026feA20",
    "userId": "505182311"
  }
}