{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xccd14074963195cc1c90244b6272890d9595b8edf125c069d7518165052dc8cc",
    "signature": "0x8d4ddb9686155a9f9766f22d17dd83bcccaa1b5053a5afc13149430744727cad68d2b04ff3706a3ba4f8b6a558dc05774b5277ce720c5949989349e49d6bc09a1b",
    "signer": "0x82b746AFd1E9c61a580FC20Bd4936Ef304EC9E33",
    "userId": "259655453"
  }
}