{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x98c8603182f8e21b6e298c8affc9c0020d4bb8e17503777c431a057003e44465",
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    "signer": "0x2EE3AFDEA4afcce094C60c49c88c63ADae2AE309",
    "userId": "957255908"
  }
}