{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd365808ed08418109e15ad4066dd634337276903b0dbcae73e80f44de7d7369e",
    "signature": "0x6dafdc30411cc5cd6748a914eca3b0b28a76a536199d0cda159fc7918469eacc5c4b6de4722680973342d6b81b2f39c9f6d4465485db2ed84089cec8d3ab1a211c",
    "signer": "0xa8809AD853823f793fF7680111dC9B3A1151420b",
    "userId": "367095507"
  }
}