{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb54705b952b8828d1ade4d1cfec328def765f73f2bed99826593c4242c9f2084",
    "signature": "0x9cbcb3838b0bab43bb41f52da268152b06f0018aed1ef0b8a88432c41077fbe762307c315417a7f4f66351e472757b2b17a38c91b4fe410631e69078ea1940161c",
    "signer": "0x106E1D92286e78b45F3702977CA4615c734Ee29e",
    "userId": "627281558"
  }
}