{
  "manageEntity": {
    "action": "Save",
    "entityId": "569357539",
    "entityType": "Track",
    "nonce": "0x63808541d062e49abaa351b9814eb9019382e809cfd6a5c3385e43b145732986",
    "signature": "0x6b5726e81ecee3f80b5f6c26d4492ef078138f9e86d1be4b89091aef30e2ee9e64ba28a0bd1ce2b0893074bea31bc442151bd5e6eb1b689e9383f4e6a22391671b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}