{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5529dc14bdeb65921a23de1201d6724b2afa133e7f6e362f1d8fa3bab4e2111b",
    "signature": "0x8c4dcad26c267f4148a4d673502897e3bffb2fdfe71c28fbe66ca9f37382c21266ca46b4328791d49024b158276a14aef3a3d0103c6fd0ff412b57e82110dd521b",
    "signer": "0x0C4a26388b903fD4825bE9029b68B3cbBa31f84F",
    "userId": "399845135"
  }
}