{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x092b54fe98cd487f565b8eb8a670bc3914d19a7cbdf9861e647f5278cddf25de",
    "signature": "0x27a243ba2972936404d39d79719f86983d16eaf94883c467008fcad4038b49752637db071abe1be31556e6215b9a4c82b35cd3c2cd037c82f72783ee163de92d1b",
    "signer": "0x5279C9997d152CA4ae073737bcCE3366f6dFb437",
    "userId": "404561243"
  }
}