{
  "manageEntity": {
    "action": "Save",
    "entityId": "388113",
    "entityType": "Track",
    "nonce": "0x293d1fdf2fbbea307c72bd33191a87ba32bc357fa293a5b511a664274c2f172b",
    "signature": "0xa3cb15c8646d1ad2868601c51e0934e962f84d6b3eb96e7fa1a1a74c2be771562b07f71c0afdb2167aa5157fd32ddfb66425595cdc03515803e9d92a1e482f311b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}