{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa252c5ce8cbc92e1f3163ad634631ebc137b55e45b8760386c09c4689042093b",
    "signature": "0x0cbc0caf3ee1f369b6097eee4eb4ec7c0be864e3d45da402c2e7756a921a4dc23dd92df56e437db6ee03736af9d1620a0b4ea22028283378d13afa12da72fd7f1c",
    "signer": "0x816FDF40B09F26CA3B886dAD63d3a11775Aad010",
    "userId": "59254938"
  }
}