{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf969b76e01e7c05273a1fb14ec815cbfbaa67a3a900ca0ea27d827e0b54b91ca",
    "signature": "0x3e246660477a5bc82601b67e330eec7559986f4489bbeb495c04a765334bf74c7b5fb2e0e1ec2eec011ebcded41a5ceae48b0a086fec4400281deb28d20cbb9c1c",
    "signer": "0x61feaa8f97d4d2ab57FC23Ed2e73f2ec85bA53d9",
    "userId": "308489556"
  }
}