{
  "manageEntity": {
    "action": "Save",
    "entityId": "1466693382",
    "entityType": "Track",
    "nonce": "0x5b6112b5269817333eb9a37b7a7e230801a771c3c25cc058c3d14191cdbffb74",
    "signature": "0x0dffac4e902c30db1376d2f5c6a826f41757a06773d308ea59567385380084a476046d25af97f5efef79b8ea27355fb24ae91103ff8d1f73269ed5fc5571aac71c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}