{
  "manageEntity": {
    "action": "Save",
    "entityId": "52664329",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xeeb9c8fd5231ba676e1ea31c61b1503642b96824d1ebff72ce9f17ac7a77215d",
    "signature": "0xb6d71e7695e46a473d3c7124c18328376798a9472f0ada1eb62cb2beb4602f3d3f559f9f0e7e36c92c4a70cf298214951f6b6b5a5a66c828d6cfbc5abe850da31b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}