{
  "manageEntity": {
    "action": "Save",
    "entityId": "169357258",
    "entityType": "Track",
    "nonce": "0x4660ad6daab6810bda17a938a0bc65f077a853db7a3d04f70b8645f474c1610a",
    "signature": "0x4ae99e0a09ad844b1a49793fd27167f3677315cb97b89c91d0c5f92baef294124b3a528fbcf302a712e110cd393f5f10750c1f6742dca17aafa5bfe70050c4251b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}