{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1d28572201fff6d6b0f824bed4f72629c8da90393696f5bfc361ac72652e93a6",
    "signature": "0x925bfc378a72926bd7e137093e697e4010f12911b844da5e8d17a24275a034e05542ee3c3abd988a786d4efe63f58fc61a1cf426f8113839f7362e708662ef821b",
    "signer": "0x97784fe684069c05DAAC2eE8818F5a38EA1E56f7",
    "userId": "534968790"
  }
}