{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x797dc2ca2d3f99393cb120f25222739828876fb565fa68d29ed6a65ff9f88523",
    "signature": "0x449b9ab65153cb957f15e3310a3e71e73cf1cf4a70579978a64015e23f9d86742fabe50ec5e612a8999f9aa66830827aacbf68fac27a36817f3f51e9b33359c71c",
    "signer": "0x19fb45DC2c238C8e4abe5659E910fFa787f2eD91",
    "userId": "156440649"
  }
}