{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x636c36238fb19be9f00a9d2a6e94d3288bb26cbcde16469a7dec4a0150b42a85",
    "signature": "0x4578ebf23182a66f4311a3a30fd22443a25fdea8c691d6e7059c7652a3b1fe41562898c54f3473e023cb553c3ac2d602abebb7b0e326df97e9cde1bb352684ee1b",
    "signer": "0x5500cFa1db7064Df41fDCBA32c552371Bec5Ed58",
    "userId": "751556036"
  }
}