{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x779901930b0136a8dbc25dd7131e25edd0d99208166625f9e3153a38d7dbbdae",
    "signature": "0x01da2de899f4d2ae39d078f7965188b246e080f95408a85fcd91b1aa2e008a0a60a45fb04e182b52c758495f81439f37c715202bc0caee6b6e3ff00ac9be0a731c",
    "signer": "0x007fa551DdeE2E94961e024eC1cfbd6811172e51",
    "userId": "5886269"
  }
}