{
  "manageEntity": {
    "action": "Save",
    "entityId": "631912605",
    "entityType": "Track",
    "nonce": "0xdbfdb8ae28c982942d1595fba05f3b4ba0672fcec2e773db6c96fd087f3f244d",
    "signature": "0xb7e6eb2c20d7aa66b2a4ddcd993eebb83354e4a27116c6feac2a4a701dbf24cf7d03b7970dfdfe912c048489be38607d7562af71c57666236dc3e902399166091b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}