{
  "manageEntity": {
    "action": "Save",
    "entityId": "872572240",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb9e3eb4f72f1e0ab136c6f66804e1e787db191f04dead631dbd96d3de1ff1773",
    "signature": "0x324b35b6c924c793395e6930219a8640b4d2f8b4401901cc52c38cc9ae99f96c4060640210578af8d5b5c7157a3607691bcf68ff598ede75b66bffbf308705ae1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}