{
  "manageEntity": {
    "action": "Save",
    "entityId": "610050927",
    "entityType": "Track",
    "nonce": "1792446703485622178",
    "signature": "0xa804858f9f7764d2a12e79a5812825d55c0ac7d0fddc269a6d7df9ab6da305370a04ce5a0465f493aa71f47c97b9b4e400c757ed80a1a9492e2851e3574701711b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}