{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7f35e3d1bb723d8d0fb4409ee85bd3b0ad4bdd36ba30158ebdab2fd92ed5a788",
    "signature": "0xb68cda26bdaf51d7dff175f4a4190a70ccdc755e6c457eed9e3f32f9c2dea678438005bdb86be860022dc832cbf7f4beca1fca0327ff1565e441c7513a38a6311c",
    "signer": "0x718D4E111f8aB6183e876AbB1496d22ba8Deeae9",
    "userId": "740552768"
  }
}