{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7f64af4f37fbcf52b408411e3cc5b513ba7f426c0c636966dcaac6aed0861042",
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    "signer": "0x187a96d4aeCA80d86902567ac0aC583Eb555E72C",
    "userId": "601253055"
  }
}