{
  "manageEntity": {
    "action": "Save",
    "entityId": "756150589",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0ba495a36e922af04fe7a27c473b23616985d84efde73cede4e53819a6b425ba",
    "signature": "0xa23d565ba5c60b0bfadc9a8b3dbc241bb21bb33a1c01a7bd8ea1418b8de027fc2d0148f62cf04423db88ff011a70a152748c7a8f55d6abc75dcb0a59f17703db1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}