{
  "manageEntity": {
    "action": "Save",
    "entityId": "665555769",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x40c7cb948e90d00ebcbe9369412e96259b1ade225f24da22e351f39cd206be3f",
    "signature": "0x63912c3263963f35a983d9399367b8a292b476ffae3ba28985a9c0bd70d7f17a7424d5d78117367288fdfa87a213b28a4fa1abc56d0b9a4308fd9672d1a92a321b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}