{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x12b54b80a54b1a6cd2aa35205394a3e01f6e429e62c3173010953a05d87fc5d1",
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    "signer": "0xFfAc133950848F6349D296ab37c8750317D117a8",
    "userId": "807522243"
  }
}