{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x38b11f4433543b83ddd72ada84958fa70516aec9a3f49ba32da1c099863528fb",
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    "signer": "0x576845950801f6283f5E91d1e1aa3acCbe24C20B",
    "userId": "840009580"
  }
}