{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x03ec2b9a4017885dfe3c881cff71cf06d552bc691591204932870eff681f8120",
    "signature": "0xd33471c89805a4b09903ad18a53e0d489c9e7377db4ae95ba81e5929cf535b1743485015fb292cd197dae69413de8fc63c8f487fc3ad7db2dfd6b90da5c48f9e1b",
    "signer": "0x6514Bf9E4fe1ff68cC2CbAB5C7494a2bedd3816B",
    "userId": "890617956"
  }
}