{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x75cad32dff7b39ac620659a5a51e1576a81979ef144550694e51a4f9dc99b943",
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    "signer": "0x249BDdf33875E5b4998Cba7767bc9B5612Eb4152",
    "userId": "399609674"
  }
}