{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x02cfd004d35b0e8195fb6947090ec6b5d5b0e61c32d3eb60cdfa542c853019c9",
    "signature": "0x1d8c8c8d78378cdcbd995e4269d6bd83c2c4703e4e8d1cf7cf42cbc0dd88977a7a1e8fa017108a3580aa31b3bfd4992b730e5dec0a4ba7e0f644521983da45b61b",
    "signer": "0x69163Aed5B32EC7f6C8a1e4aDEd7fD7E298F9521",
    "userId": "508931608"
  }
}