{
  "manageEntity": {
    "action": "Save",
    "entityId": "145624854",
    "entityType": "Track",
    "nonce": "0x5d8a892040013d209dc36f96b5afe49f691ab8119f6f0f98f58012338f74c4ca",
    "signature": "0x0b380ca800d6c5f1c112cc43745c20d25914b3f6c7509c5ccfdcee42e19e399453daf8070572d260937070a0db30c772cbd7445cdc7c24830f8d682f6273b9cd1b",
    "signer": "0x8876AcafD0aa73B9f12a77496b87C699aF42B15f",
    "userId": "906222947"
  }
}