{
  "manageEntity": {
    "action": "Save",
    "entityId": "1769155309",
    "entityType": "Track",
    "nonce": "0xfbd9dcba537fee737a93356390fe8ae53a9de8f8c7f68ed6ceb8f3590f168257",
    "signature": "0x1ace59dd36bbda0bb4d26470b872a6142c02410d49cd96a14147e2953d43902c05c1ee5835b49ff3efe2b05aeccbe1a1c06ceac7f84df2ae07d25220a1df05a41b",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}