{
  "manageEntity": {
    "action": "Save",
    "entityId": "1673758253",
    "entityType": "Track",
    "nonce": "0xe5743600e82b899bdf955a8d3352a8165fae8c460e33c384f8431530c442804c",
    "signature": "0xc06cd4a8236872e3aaebcacd22beecc8db24126f6b05cdda0bbba82df1332b620b7516244a9cd452d90a8f6b132763c2add68acd336bb8986eb5e5840568edac1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}