{
  "manageEntity": {
    "action": "Save",
    "entityId": "1437031746",
    "entityType": "Track",
    "nonce": "0xab0c24a1747c388d2b5a99a8162dd4f821c02c13add5141451626d3ac2d0b7fc",
    "signature": "0xf88d3f72ab8385a1935e6ceac27ee8223ad6a6e4094c5bd89e1a7ddc9dd256f93aeee62194eabbb15e59f83366dc61bb41dca4964e337e0ab0df799fbf97f90c1b",
    "signer": "0xc732abD40749026D35a8f4162a803dAAf665371e",
    "userId": "496394700"
  }
}