{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcea5f381634d8186e8e52127df174bcdaee94a5ec82db99cda68f8a58ee38729",
    "signature": "0x0b1a236d2504ff52595fdb667ca60ce5824997226104474d894099658f977bca173b9557b58090b7874e7a0e98a4903432e519d12cb4832dd65c4d10a4a340631b",
    "signer": "0x2c2058A73BD944840D7B237Cbf52386B5831b70f",
    "userId": "419279596"
  }
}