{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9cdafde70f27349e3b89464d5f010a67d04af2a1f2acef432b410595b5ee5ce5",
    "signature": "0x22e34c4f1c8f9d5fb335fe6e2a2f04c871d57f4ea7a4f0d5ee20609ca674a19c35a4f7286da39911e1ece1166ac9a504f484341727a7107596bb10dbdae56f1a1b",
    "signer": "0x5071366AB603273E4DD5018aF6ee7e6459160231",
    "userId": "961912866"
  }
}