{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x222f1cf2208f8322891ffc792006547c5bbb01f31be78ba9a86299b0925bd0e0",
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    "signer": "0xaA70F76aefB1aceCB78C94D23C16633E39CF8fc9",
    "userId": "342378154"
  }
}