{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfee07e90259cf9db14884274dcc497d0b7acd8aff4fb96a0c8b7f30f5795d115",
    "signature": "0x874b04d55feffb6fd3b6e33733a167bb35ee98c0ab0e9c55e127c8bf892ca6476ef2722934978a28a6129b7163fd47bd62885603e3802afdbbe27b586a1daf181b",
    "signer": "0x463C9186e9BFa098e28d0845ED9dEd4f78470a01",
    "userId": "423462177"
  }
}