{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf2f23d5e4108cca85054a6854e7b7268171aa502276d64c2b74f45f9162ca8a3",
    "signature": "0x58596e1c8e8057f1f02426f12b5e1287e1ee9bb17b24fff363936fcf1da941796c31e0ade9cd9fe6d8f14cb87f7337d7be99e80fa32fccbb7a2ee3762b0007401b",
    "signer": "0xfA591a448e2E0C39a919A7bacF597E6A020F4d76",
    "userId": "412651556"
  }
}