{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6c819513b042553ff223177eb4fb694afbe2457da41609366e82030efabe21b9",
    "signature": "0xd6b2725279641bd0f46aba038cfd865d039070e9439ead6132a8f5c8605e3f3e0dc719695e7dc9dba9fc9a34a44d48aa6f0f296a9475d34d9c326902d3cb6eaf1c",
    "signer": "0x39C15699EEEc50BCFB52d4A22F5F54cc5606ffC1",
    "userId": "304772297"
  }
}