{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x26292d39b106150525697bccf813a860e4f2d476be34b1661322c6405de2c95e",
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    "signer": "0x6C3dfBb34F175eC157f17632F02a690cFC044641",
    "userId": "30425633"
  }
}