{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9484b9d8f7b91ecd8666b426611e7d3eb67aca2e0f94143965fe5543370daa17",
    "signature": "0x31eda1e0c7c6668701cdd3c58448eeef9a920a73af479b0a885ebe15a85d498308a429ce1b4c3dd83490186c2892f96d53645bb2bddae39819d5debfa7153e5b1b",
    "signer": "0x6B3fc364E4fD66E8aaD9cf933429F39b6C971b15",
    "userId": "429038292"
  }
}