{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6e045db77f5fe64e7becaafd385a16f4d6377b474cb5c88458b8032099abee9f",
    "signature": "0xccaf282aa873a4b9b8e74c1ccb26e8da543f96ad5665bc0c1e4eda8477766ebc00005fae798de012375a8f24bdbe51bbba2278b0e90e3f0037b5b475126582d61c",
    "signer": "0x8cDab4bAdD2D0502631325D9eaa877865F6c8981",
    "userId": "43933168"
  }
}