{
  "manageEntity": {
    "action": "Save",
    "entityId": "138088985",
    "entityType": "Track",
    "nonce": "0x30d9c2f0058fe8644a29e5e6afa45664efb651cac1c5b5c3d73e2aa06fafe921",
    "signature": "0x9612620cc601822cad996c7be6e4e4ecf06e3179943402452aea7758c75b326e46380bbbbed21533b75876d550092c8e8b9ef8d3172e2514417aeb87920364cc1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}