{
  "manageEntity": {
    "action": "Save",
    "entityId": "1765610998",
    "entityType": "Track",
    "nonce": "0xaf7618680438024934063128f1dacb90507e6d8202c1e74a68981e1ea978bf80",
    "signature": "0xcf967ed9c16d9c204a0e0597d89b3a97d2ab325a5fad7b6348697fda580decdf037bab30da00bed229cac3aae22a20df9c0d69e853b4b10e28e4ac8ece83e1831c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}