{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x428a9e356ef85b99cb6fec23eec59188605291c1e2922158befb8c2453433911",
    "signature": "0xac535eb20b434e4b341bc912e66210da771c1e9611c50ec70e7a312de6da6c1d35b8ce9975c402e8dde1b2d58b9d163efa61c326fe480ac9bec6a2ce0a3303ad1c",
    "signer": "0x65F22dd9Df3Ffd8B830e556A1fE1a14e67fAA319",
    "userId": "270929602"
  }
}