{
  "manageEntity": {
    "action": "Save",
    "entityId": "761631460",
    "entityType": "Track",
    "nonce": "0x54dc0ed26f3a891f3f8f49183346b8dc6db80bff9812163e24324f3becc51d6e",
    "signature": "0x27934e4a97994582fb6e71c32df40599f88335da575cf8045c708be3157c2904015bbd5228b616a7b5b049540aacff41b98feba7a75d083ec3e8f136a8c65a1e1c",
    "signer": "0x5d8091c5439F52184dFD827f33FF815dCc827bA8",
    "userId": "52403052"
  }
}