{
  "manageEntity": {
    "action": "Save",
    "entityId": "34394663",
    "entityType": "Track",
    "nonce": "0xf4441f1bc7abf36d738a9ce72cc4134a73be68c2bcb2ef70037563c76a9a182d",
    "signature": "0x1f7508ec741bfef8502470fcc4c035c0449ab28aee5a41332c0563525c3c15423ba26def1409e8f6efd743bca6faa6cea734de88e89794cb9eaa306283821d701c",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}