{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6ea08b6c72a563700f19ae2f54c1c0ba3e72d348d90fa9a4d71515792c42da68",
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    "signer": "0xE2d9E391f8BF40b0B8168ee9aAf369Cf123e10df",
    "userId": "600315060"
  }
}