{
  "manageEntity": {
    "action": "Save",
    "entityId": "728843258",
    "entityType": "Track",
    "nonce": "0x33e886c6545a8df97d98f5c18e86c7c143b0b373e5e653ee2937fd5f659e2e2e",
    "signature": "0x8ad69f9aa00bf8aa7052d8fbe1735405928c4de155f305192083a1e55653e0793d33b6abf60d7e2854e481736411f2c5ca19134eed4ad4c6e04c36bc594162a01b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}