{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xeb18d91c4ffba5f7a82f8bae394ee799eb2d671bef4f8316574947741f0c7bac",
    "signature": "0xda87b6d66f85c3e9ff575c36a635a3119a50f39e9ec3f645b2a6e3496382199a2dcbbaed2809214203be4e5b68b1ac300e429ec0833866ba335c0b5a654db7771c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}