{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x07086c2547c9e30654eb07090767061e90bfa634360b4f2c957ca067f0e2e035",
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    "signer": "0xa862A21254d5Aa03eA4D1C3938CA831bbfb8b7e0",
    "userId": "317339853"
  }
}