{
  "manageEntity": {
    "action": "Save",
    "entityId": "1585272265",
    "entityType": "Track",
    "nonce": "0xa98ef93ddbbfd5e0d1d17c296d655451f3ae727c8d3df9ac3b29bc1b0e2c1671",
    "signature": "0x67bb09979eac8603a82e65ef2013425335fa0a95fad5a59e066fdf739db7ddc01d7fc4b45b394261549d87bf27b9ef8e125092e07f6457fab4ef01528047bf4b1b",
    "signer": "0x375963f281CEdF4D9D180496F80A256D574daBa2",
    "userId": "981824750"
  }
}