{
  "manageEntity": {
    "action": "Save",
    "entityId": "2103355471",
    "entityType": "Track",
    "nonce": "0xc31eb154447e271799351902e3fd6e2befd33276ed38c42b73556f8c89d1d015",
    "signature": "0x013562a0045b5b39507fe3840aa66f443ec96ade4ea4b6fcd2dfd502ac7315b068ec184122ce4748268b6a168c3b8fc62d6527546b32dc43ae077c19715357811c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}