{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf187ee36bd29aa8e522d136fa36b165e6e0f0c1196a9541f454a721913f403dd",
    "signature": "0x9b0e98885876e129901e2da740e4ad52dbff2dde3b140293548dd4d930eb7c231473fade3c6081e89488d9734778b0724de847f196badfa375e0dd8eb21938b71b",
    "signer": "0x3B668D03B0741dEa82c23c2d4c43AECaDBfc4902",
    "userId": "886725809"
  }
}