{
  "manageEntity": {
    "action": "Save",
    "entityId": "1518588100",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdfe2c64d92c3f32d5ef01e9cbfae26d563f258164fafcd715ab8dd436f82220b",
    "signature": "0xca5ddea5e7f8b6e2074b9a257495d8c5c64f9b7a1f95a8bf3d1beed4e157723812443eb84cba571946cc0fde6de14d571e24389ad70e5848f5ccaf11a3c94f191c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}