{
  "manageEntity": {
    "action": "Save",
    "entityId": "1631598777",
    "entityType": "Track",
    "nonce": "0x3245fef57a213f61642502f6d8430e3b0c5a40d3d305e17ef4fe1b230c7eb5c4",
    "signature": "0x8dee26f8cc064a0234c7c1d04ff89384f633cb4a8fdd31af12f362e456fc34b9724f3ab39105ca4e8ffd2ad5d1dd99d1a6018f3f83caa716cb8f44c5e34145321b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}