{
  "manageEntity": {
    "action": "Save",
    "entityId": "384299055",
    "entityType": "Track",
    "nonce": "1792380736415203903",
    "signature": "0x14343bbc76b7c49aef2d58d24221e80bbdf5772e7c220b1b7d54c45ea5f29380342882313d96c47d0d1e396562cd34208ba8cdb763b9c86d9b928e6a17b4a5131b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}