{
  "manageEntity": {
    "action": "Save",
    "entityId": "1370103944",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8a58a632b9c24314ea79716afc2e3a258e261993001f18751b9f846b90c73e53",
    "signature": "0x74da546fa82a895a67eda13f079bdc1380165ee349eccbc11fa22415d799e72e0f86f9afe0d0c54ba9d7f88e96dc46d4b02fe2dbc85b3c313f4c90abd6f799ff1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}