{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa7eeb774e1c2d551fd5154308284377e2fa7a966e0130cb58f7252fa4731cd63",
    "signature": "0x116cbe35545a6fd30b158e4b3080aed41fb002706ff4e9e3ac24e1d34efa60ec1c15466f1433443471726d5e1a08bf35010893445e52cdc20237ca4bdcc117e21b",
    "signer": "0x8284Df0C9023618C9EAD23793e686ed7c7d8BE4d",
    "userId": "370099971"
  }
}