{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa66987219c584fd2f8176eabdfc822105c0de7ffe0c39acec9272f0f85e451db",
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    "signer": "0x90549557a9F929F199089B4649D9A747b1177506",
    "userId": "894694586"
  }
}