{
  "manageEntity": {
    "action": "Save",
    "entityId": "1123968096",
    "entityType": "Track",
    "nonce": "0xb97ce2b503b3c567218641f5e285e30059a590de9082073c4db9b1ad721c8d64",
    "signature": "0xd3b7208b3dfe3ecb96386dcd1111ea09a8544bc9c4d59c13d737abd38a7ee09d54f53aa81de544f4f05e5167f09d4cfc42fba05a98596d759633d8f95bbee38a1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}