{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7a998a6f3b4fff30e15625d9149ef64072af6e70ccaf1ddf8eb740b73be9f33b",
    "signature": "0x47c6ed22459fe3fa9af43141628325a40171fc1c94631d9abecd59b8dbde8a71699f44cc09d2630ebdb5a18ef670f81092d876f0326f4e2758baf0b269f72caa1b",
    "signer": "0x94Ce870556bD917858b20656e74496546d67F71A",
    "userId": "573536019"
  }
}