{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb491c025f8d02c541918f65b7271bae2b50ead865e85f798fb74e0e36e2f992e",
    "signature": "0x7db83be36cfa9d7e05ccb9e1341e14af0814574f69e99df497bba23f88b2eeaa502bd7f07d67be05974625a66497e756fd2f716a6c359eec47e6473575e8281d1b",
    "signer": "0x9Ab46FAFcfde52526834f886709F9F9B2342F32d",
    "userId": "610994430"
  }
}