{
  "manageEntity": {
    "action": "Save",
    "entityId": "108581",
    "entityType": "Track",
    "nonce": "0x9e60bf60f5b825fe2966d79b5c9cd47e13a38357c3115c3297f25ba8d7823220",
    "signature": "0xe8d03142339c8e3c5e092231db44db6cfc0661fb98abf3451f36fcd91b03616c6d2cf03047f2211cfd5c763cb5b1da11e0307fff8ece26b265c8cf533329aa2c1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}