{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1533553d5b753dc4a2e68b0f3c269ae961632c406dc8be7ce6a3725c229ef3c5",
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    "signer": "0x1fe2af59c615c0c111509b8255F966Af4312da41",
    "userId": "788000444"
  }
}