{
  "manageEntity": {
    "action": "Save",
    "entityId": "1696991250",
    "entityType": "Track",
    "nonce": "0x1c3978c98233babac887bcb16b4577fd847add3623b1cbab1efd2136dcd0972f",
    "signature": "0x8a4c12f96f44ed3495baa0c9f2818277cc6eaf6750c2892a9713fad7a42e4403336c8c724caf15f750b536aef3ba01a6b20c6dc035a7bd4d53fbe96514b2d5ec1b",
    "signer": "0x9c3B758948f27dCECee5f39438D5E15d6e82FB67",
    "userId": "283863311"
  }
}