{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x452dc8358e203a84c52d271662bd4e407ff22ba376483ec18c760fa2dac5e962",
    "signature": "0xd2d642afa893d02f1165ad97da945466907921bc0ef96118dc293f85c1ee1dbe1c98902a3424f037b499c9d172e1ec4ca77137af3c8adb10504e34ccb231e9971b",
    "signer": "0x11811EDC1336BB013991447C7509F40cECD465Dd",
    "userId": "95933018"
  }
}