{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x82649a080c3cc260baa03c43110ab9c2b112d8672b46402162b0ca553d319cc9",
    "signature": "0xb2967acf433502a907113d010cab21a19b7f8b71733efe85309e740a08b04c330f447e6d6d456e24520e89afb5c226da41cc373e603c13c7aa8097fda66fc2991c",
    "signer": "0x6e0E2d70aa2F34f687b4b7d7076ACE86a19d1A5F",
    "userId": "266646668"
  }
}