{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x31ef0828024da795cca2fe67155df3aa1c4349dcb604e7ae5a57d5f6af83d9e9",
    "signature": "0x21db464dc6500c425e5d8890f9354ae033f02f95871dde4b35fb39f98d43598b29e306a2a62167c7146fc7055f1083c666653180f31d1d1ce4ad7ceebe30fbe21b",
    "signer": "0x9720ef26a1f7d80048cF4a3d8Ec98DFA87c1e334",
    "userId": "254520742"
  }
}