{
  "manageEntity": {
    "action": "Save",
    "entityId": "2011181915",
    "entityType": "Track",
    "nonce": "0x9c37c437d914557c3c79fd6411bf0bd77077e14821f6ea66e3db54dc9d5de191",
    "signature": "0x599ce02ffe05c7e2f084d7ec5daf638faecb25120b8747c5ad7043d0106f221e77bdd14b9279f8f6dbd1dfa80dee50dce78f48feb50ebdc488aacb582b6f4f9f1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}