{
  "manageEntity": {
    "action": "Save",
    "entityId": "496686",
    "entityType": "Track",
    "nonce": "0xaa1031a92f25fbfae3370d63c0912f24b3512959c54bebaf9dbfc26ff236f2ed",
    "signature": "0x506a1bf83aa4bde300974f7e3c2872e2645e7b085eeddbd3c2cb7fa2bd49bcc6246b8e4f15ba4145e349e4ff91b831f4d7aa69270273bc5aeec9e7ffa1be6bc61b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}