{
  "manageEntity": {
    "action": "Save",
    "entityId": "124216987",
    "entityType": "Track",
    "nonce": "0x57029bd06cac013407a33a501362d9aa1db2d90b1990fb2afe286feee340a8df",
    "signature": "0xd357f70f1676f42f6b1f899a42e2aff67b0b7483343b4ed08a811557403e6e0a01c138153a9471bab2e4a9c9d5f0d4e2bcb550866bf2f67ba4d4bacc502957dd1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}