{
  "manageEntity": {
    "action": "Save",
    "entityId": "849641434",
    "entityType": "Track",
    "nonce": "0x8ef728b94fc4c5909198e9e99840257fc1a7e14c7fa1859c003dbd5a45ce3dee",
    "signature": "0x775af612c075fdcd7fe92cc7238b515ebed689eb2886a816682916fa7454a8d15c61225a4757efdb2422c7c952a3530ad4827461711336d8262b29c0e54587951b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}