{
  "manageEntity": {
    "action": "Save",
    "entityId": "1399583511",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x67cf1803f1b565caa7fb6fc77f9634a92d321fc825cd250a8d240a8d4304fe6d",
    "signature": "0xfc60ce6e4bde4fbf2ccb1614a232c08eca76adad375c27ac22cb7b81161eef2a071f2b4e61d788077e85cde9e2d61515482923db1cb7dfeb9e29e00bc327122e1c",
    "signer": "0x8FB027E4df97D62eD4C46f245e31Fc7369f06bEC",
    "userId": "288732286"
  }
}