{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x175c1facd8378a7b6cda74188f911f45e167f70d13f36e723da88bc36079c046",
    "signature": "0x3f3411ec00f2136660516c38a120c85affb5f8fa5db628494428d02bc648bc69098ccaf9107a1e8f5cf32835cf3518406c255f780178543a3fccd374d31b0e251c",
    "signer": "0x2b7EdfB2dc607dD1B490f4FCdE0843002EcD22E7",
    "userId": "737318260"
  }
}