{
  "manageEntity": {
    "action": "Save",
    "entityId": "596369736",
    "entityType": "Track",
    "nonce": "0x9b5e5378407d036046eaeed98d48a44977a5e02c4c85f04eb6159ab560e59b5c",
    "signature": "0x8840076fed456e5a457c527c2973260f56635f94e0208930f72da7b13930f382460caf8c7ea47b69922cda4a76861d5bc01fe16e7b81e925b9a435d93f0caa4f1b",
    "signer": "0x0E71C12c426F5C9206F778713f48B60477CA943b",
    "userId": "29088079"
  }
}