{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1f7928f004d78d5656df94c464f2c02ff196cb8905e3f6b2072db1ada0c25b98",
    "signature": "0x09549075c29986f604294a61be3b5b753d0009afe80e65b5ea1c623aee8734332cd25c0eabc98d74b2ce686d9a5352ea5fb4706df549ff1b32a0565e81a98e191b",
    "signer": "0x343c684b1503ec463E59aea4066483EAa82F8f3E",
    "userId": "336711311"
  }
}