{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0d074c81be902b31ac1bc491991176ed622677bf140f07b7ece963ac8797973e",
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    "signer": "0xE1606Fda4793C81543febFfc652aC7aBB1a33faF",
    "userId": "457856694"
  }
}