{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x24c985f7ffa41d55cacc0535fff01390367afb4ffa037d698ea4b378ed90dd84",
    "signature": "0xf19642f3e174c327c2ff7ed76e61e803f1fe6db96061da58fee6ded9d46e1937258a26b844e55a17ce9c7358056d55b5273875a4f18f398cc37a7e4e2f82785a1c",
    "signer": "0x251d9fFBc4029d5692B08aDd0a2D4ED2e2e4b94F",
    "userId": "897281977"
  }
}