{
  "manageEntity": {
    "action": "Save",
    "entityId": "541406",
    "entityType": "Track",
    "nonce": "0x07e8e83872f8867df94c308d6de4dd72deca0b224ec2383de543c73d271421fc",
    "signature": "0xc7ae22ab57ad59e72f63b4ee5fcfc65d73c9735af3d70ab05e3b6cc92817c9e051ce7363bd03574f69aa3039091b83370fda9f0c54eee1ac5659215833682a611b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}