{
  "manageEntity": {
    "action": "Save",
    "entityId": "245700246",
    "entityType": "Track",
    "nonce": "0x7bcf28c4e438ff543fe918a7d82ff1c0798b9d7603099d7f36f172b145d1e984",
    "signature": "0x4a0eeea678035c5a4964e4393d3cf07e024265923f762689597307dec81623576df6d808bdc12685c8a59bba1080c3b9d1ff677791192a1bea3391b658bb84a11c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}