{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x68172ade6127c59fcb14293394176352a1e6565f784a4af3c62bfd4920eca25c",
    "signature": "0xb4b69dc966bcbe7527b28b4bd9f05b4d0db5a414ccae10acafea80bf54a322c858e57a771030aea2ccd41bce6b76fb44973c272c7249fa2c6874679c595f2e161b",
    "signer": "0xAC8b6ff37a7905Be129C642ca5D2ad5AB8a7FD0A",
    "userId": "748754995"
  }
}