{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x049ff3b9fd8a3e2e386f93323446ca020dc094fefa3fa35cf5f2d81e298d05fa",
    "signature": "0xfd6b9bd0f4250ced233b78e0dfadc7137cf10be0ca373f5d787292254936b752579ed6694f3ed12b74aac11b3ec6d5d15f8acc751e0edcd4399d111c68b1e58d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}