{
  "manageEntity": {
    "action": "Save",
    "entityId": "340168076",
    "entityType": "Track",
    "nonce": "0x0f29afa14ca6844a4be79c47ff38bf5ff8807e371071d92ab6356db6cec5d52e",
    "signature": "0x5a3acfedb25f6ef175abf32c5fcdd6c5524853d57129c95176e9b0dd6fb450fd7747e66ae12b071968d0aaa735b43decbbee33d2f61dbe1b10d21e89396ecd101c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}