{
  "manageEntity": {
    "action": "Save",
    "entityId": "29357275",
    "entityType": "Track",
    "nonce": "0x295ad69a6db3c6922ee4a326bac9efb2bc5e2ce20279408a108e0ca5eb08e266",
    "signature": "0x7b4761ff66b34df78a21e31993e6990fade6842a592320412c9962d5ecc0742e36dba05a2e414d48f35191fcfa662145c20eaa9596c403fb2264fbd9302de8c31b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}