{
  "manageEntity": {
    "action": "Save",
    "entityId": "1406133796",
    "entityType": "Track",
    "nonce": "0xee9410763ed9d75dc837548d73e20c3f42477b996cb07e5a5010c50f2948d51c",
    "signature": "0x81e1a328caa4d39f614af9a549315449bc95089eaad6619c738705f6581551595ff03317ff32470e8092faef4b3a3b6d5ff58b9d34030275b4bac1dbf2aeb1971b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}