{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x58f1d003be1bff2f2a04ddf35e77adb2fb11769d95ab55c390e983eb891c2777",
    "signature": "0x7096570b941b22e6c9b48f7b62060553cfce483be9d4186286d137aba803c0602838b848b082e99bcfb49514aa52ccf9d60a70fe58c20f3ace074b41081fd5401c",
    "signer": "0x708A7061912051AB22f6d4ca04e297c4d0d29766",
    "userId": "561658710"
  }
}