{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xceb8b7b1afb33c4b4b035807fdfbfa4bcd286e3f96442cc26464d850adebdbd9",
    "signature": "0x1c27fee5431a42391273f25164ea17aee9385d9ce6c25fc04fa503d2692969035f4db7cdd66c83317e29920d13e541e4f06314ca7bfef8614589617b57056fb21c",
    "signer": "0x645AAbB3BF848412862B16580BBDb4CEeBBf2EE6",
    "userId": "47150955"
  }
}