{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe770abdce4981da4df3a1bca882802ba335d186777916d577a54c9040b5ef2b5",
    "signature": "0x583725d8e6c3b50b791816730af5cdb747bbf40688f9fab60191b12820d539151bed01fc7fd46f0fdca49dd272243d08390bbc3033b185edb90332cebb9c9b181b",
    "signer": "0xfbcbBcbCb8200C7303553ecc93920e188Da18ddE",
    "userId": "82706702"
  }
}