{
  "manageEntity": {
    "action": "Update",
    "entityId": "300631984",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierabapb3byg3bpls772x2mtfnqbnpubmisayh32plhd2p72mfdfyl7q\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":988255634},{\"type\":\"playlist\",\"playlist_id\":2064592875}]}}}",
    "nonce": "0x1d04af6f877f74b1ee52482e817b54e9ec5f90ddef0eaf2a8b47e73df513faad",
    "signature": "0x1b335726f87af362276a02997b4b18447101b6ff46ed0bb6348387ef4b6eacc34fc288544bef9cd9eaddfdf5511289b645aaab2e7f438929274c6a22938e44141b",
    "signer": "0x9e70f16e2cf53214EF1E8eDc0397d06f589F7d58",
    "userId": "300631984"
  }
}