{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc25f4f37e82b85bb18025c9d684e14b890be6a0063ecc3a1dc3fff2b7343aab8",
    "signature": "0x8898757860eba0fbf2562aa6a77c5f85fd307e1156dbaf6810016acef6e2fc3300e3b8e677c66830c2e6c082b47e276565fa8cf471c5009e8a0bdda2acd0ad281c",
    "signer": "0x845d1b4d65C2614aa0Abb9bDA370552e2CaF51c3",
    "userId": "676596251"
  }
}