{
  "manageEntity": {
    "action": "Save",
    "entityId": "392371587",
    "entityType": "Track",
    "nonce": "0xbf6d9df07f1662ebd5f5285e2532d128c5532956acb16904873432bea6c5586c",
    "signature": "0x45e35fe64978049cb6324a7478591a2a43cf2977fb031d06e931d550d78fb18475bfc02a0b7cb3e5cc8fa76054da7feb3d7e889d9aad22773566628bd420eb1d1b",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}