{
  "manageEntity": {
    "action": "Save",
    "entityId": "2129227738",
    "entityType": "Track",
    "nonce": "0xb864b5f03b4ce5793871f37e4aef6651825a5e6af8c7c8f90a02f8cef42c0001",
    "signature": "0xbdf9aef53ed4c606a6f80002c2e498de79791b153842a2a315eb5367777314ce48996875a0cec2c906e514a324a2814f8307089d933c85a065f447ffaa43e1831b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}