{
  "manageEntity": {
    "action": "Save",
    "entityId": "89299385",
    "entityType": "Track",
    "nonce": "0xd98fc7e475968c872d9931f21bef7c20abcdd7eeaeb158f827837716fd2c3acc",
    "signature": "0x2b498ed9a2fca4f12e3acefdcfd1626a41814dc396f5f14a68955afd34c2aabd2a9b01d9fb295ed9e705caf51355ec5b907c4a90d251f85499b9bf5b5517c94e1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}