{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5cbca808a4c901f8911699b350e027eae2fca4b43e896e741a04189ef0331bec",
    "signature": "0x016313e35f23272b58e7573fab91125a4e23567d80b9d32b6d8d74ae9962b3fe7610eb724a289e27ba89954226ec3e9e604bba7ffa7294c8f7ceafb6ac1fc9cb1c",
    "signer": "0x057bDB0458FD76561C0398Ca305bD6A53C33893E",
    "userId": "889486955"
  }
}