{
  "manageEntity": {
    "action": "Save",
    "entityId": "1313500047",
    "entityType": "Track",
    "nonce": "0x25f84a066e22fdfe6308241b1095d6bde8ff685a66583b2d718e8be3a81e957f",
    "signature": "0xcfade7b13cfaf1d49701b690433e88a65e700ac41fa930b76554cec98f772ee724a5c912358b3c244860f401131350c3c2b5444b97443823291e2a70896958791b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}