{
  "manageEntity": {
    "action": "Save",
    "entityId": "847998600",
    "entityType": "Track",
    "nonce": "1785852565621213418",
    "signature": "0xb2bf22f3a8b5d55460d141b6e8f37ab93f66bb1605f6f0b8b3599b6e08d1d29165518fedf0cf6b2dce1767493c47b1ff159034d3a6f57765aaa73354007eef7e1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}