{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb2b6fad6cf282bf5cef8f4bac0777181cb008e803456068e6a11c2504f90b58a",
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    "signer": "0x59b2AdB5457e737F50672cfd7783475958BA125c",
    "userId": "663695959"
  }
}