{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4a63692810be9e616b652ae36d3e1000eafc4bd873c550e49ee21fff2b18bbad",
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    "signer": "0xA72E85Ea59c53A884a004b16dFCBa072e50c8aeA",
    "userId": "552828024"
  }
}