{
  "manageEntity": {
    "action": "Save",
    "entityId": "41949565",
    "entityType": "Track",
    "nonce": "0x86892725700ae5a6f09431fbad4962c9a050b419317ca54cf323e212aa35b6c0",
    "signature": "0x78a7a8660e8729ba495d3f6a9865dc9bc92386d4244414d2b9812d4737f602dc2d3c41c7ace73da3a7e41e6c53d925eb3c80c6276ed0f79127723f28a5fba72a1c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}