{
  "manageEntity": {
    "action": "Save",
    "entityId": "1754842139",
    "entityType": "Track",
    "nonce": "0x933d6c658404bf8a02f0da3ea3bc3a0140f58138583f51006e1e24a65aa148b8",
    "signature": "0xdde17c546a029afde6e10d3789b62a3feb3284312a9677e9512d7ac6c505869d591a642f4d6152ee021e315b8e2d02a571b16dbb59e046e7b8dbda26c01ce2721b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}