{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x15dfeff358783c73c562644ee4c806839d4fe29684ac3fc71cbf4801f025f0a7",
    "signature": "0xe85e58b032429387beff939446d420aff59b1e66e58487817f1185157554effc1ab2ed11a735e77871d562bd52b4d066b81545f956d9f31bf0905decc01c549e1b",
    "signer": "0x7D89eD1c2C9744b86AE1D1301E8F342289D2f3cB",
    "userId": "58600206"
  }
}