{
  "manageEntity": {
    "action": "Save",
    "entityId": "1698645899",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x64d48267f97876e500cf69c925731b6fc22d6523719396f9079180606dfb9167",
    "signature": "0xabf1206a79ac71f7c028661c438189fab4a461a99f01b3dcf79bcc4f8b696e4a1e0a4b68ad209407d57b8c1bb1c9723826c4f42df94d7b7695cc3684b2598ed01b",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}