{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6a89e18a7c211c48709cb78158dd5ef193a9ba60ecc4c3a2f89a333d54599061",
    "signature": "0x0f48049b2730237a22787cba613077a3c5c1ea6a38b95ab27d30671181d3f98e3237c0e8fe0b78d3e28264b256dda282613f79f45a5f46f9d7060bd0b17ce0c21c",
    "signer": "0x08971aB02c204C82137219BB1001669acd69aA27",
    "userId": "463429578"
  }
}