{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x23fa463c4cc3f69c80342cad85ef87ace91149688e245b873e213c1e168e08af",
    "signature": "0xccffb008c6216c69ce6925c59af6adf02b4ccf7fc2751d444b5b2d3d7404b2dd0f8503b5c63af73101144c05ac2b96ab2d59aac16b37080543eb72eb1782f6401b",
    "signer": "0x8f16Ad015d95995C7E9f3c9B5c6b088CbE1f9dC5",
    "userId": "388101191"
  }
}