{
  "manageEntity": {
    "action": "Save",
    "entityId": "583606",
    "entityType": "Track",
    "nonce": "0x350759b10dcc13070c191e952fcf0b767f5fcbd77e796ec0eaa83cc3a23062b6",
    "signature": "0xe3a8be698bf50378273b52ea4cf2851f1397cee0a1ba29182651be90d575c97149e39cdd1d75b4970ec2e0cd74f375d625f1c97206478f2f3858bf215bcf644a1b",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}