{
  "manageEntity": {
    "action": "Save",
    "entityId": "1203573967",
    "entityType": "Track",
    "nonce": "0xb3d03cdcf9f387a81ddff7c14f42b81ceac0d7d7e362dde343a543f591e8d554",
    "signature": "0x1fcc5c80e0cc5a3d67a2abf800eb21666c9c163a0ccb5ab82887d68e075748f602d36033ab5f5443835c11dd28ea068673b17324cbb7b06ddee1b9a6f8a05d991c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}