{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4a8caa2d7ecf820d5d4d7ca0aade883297df7340cf5f806413d3520d40ea0619",
    "signature": "0x7986741adb61d18442db9c1b53d1007be737608a4072db6ff4950995a0755e384339ec27642968762653a79e2510d0ce006fe24cd30e793ab2ab5be3fe39c4d31b",
    "signer": "0xdD96FaEde4cf76A188A9043682466440AB5a8CB1",
    "userId": "976057254"
  }
}