{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0cef86573e5616e28bcd218d2e49a109cd6597e81ae509eb0d119ac9e781d2e0",
    "signature": "0x0811de3f6c5eb107d3f8dbe202b3d0d309cba12af76f8bb32c0a69be9fd19255054cf2b857ecaba49d4718d6884d625c6c85f166f48fa2ea488f49968b1e8ce51b",
    "signer": "0x5e64f244924C507665E7fbC2c650d842391E5eb4",
    "userId": "299955678"
  }
}