{
  "manageEntity": {
    "action": "Save",
    "entityId": "1628771504",
    "entityType": "Track",
    "nonce": "1792417419858469436",
    "signature": "0x15ae03351c88f15e442c09e9e9d4fdede25198da5277b57b6121a80db0b817b349b9e5cbed741e49b8f40ad326bcefbfca8a57476b0d093c2da927f360c6e8f51b",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}