{
  "manageEntity": {
    "action": "Save",
    "entityId": "1366821949",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb042e4e7f0eddf777e814b72d88058df5cf84f1e646855a2c6abc0d1b6ab6c2e",
    "signature": "0x971d7abcbcc17cc0959974c647cc8fa35210b313a9de8482c28ed9f0c73871dd32c373877dd87e43dd75f590648462b9f6e178803d3c317af580940b5a03960c1c",
    "signer": "0x98B3f06eAEa080E8d8b1C86F1c9FD36Eb33dEd5D",
    "userId": "615702798"
  }
}