{
  "manageEntity": {
    "action": "Save",
    "entityId": "1567262218",
    "entityType": "Track",
    "nonce": "0x47b3fcf52bd8b02ad3778fcaebdd11f65ce09984146df559f430e3e0fb20d47f",
    "signature": "0x235c00ab59a02792f1bbc712b6dd3e9602bfa8f6b25cdada5c56688b6876a08a5241b9eb1f4136a5093f9d571f2b9a7da1de06039246383f58513c1d30e79d211b",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}