{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5f66e77d0867b52747b146c924457c7c861459737c5b58043c3deca5ed949348",
    "signature": "0x57a21bc5b8b8cf4936d029a3e6016c3398ff2f83274a827d1f3027de72dce54104e59529a8486ad9892fb9e26993cc1ed9be5a49675b24a92a98354b2c5037c01c",
    "signer": "0x68833ff261f5D2053c7f70f344CF3317811fa1A4",
    "userId": "701658804"
  }
}