{
  "manageEntity": {
    "action": "Save",
    "entityId": "1093451284",
    "entityType": "Track",
    "nonce": "1789634365850351088",
    "signature": "0xc764e7756c8f96bf95b49a8d9baab508fd90758f52ec1c430cf2a2d9067b30a73ff3439a65c0950c2ed69390ab5861171e352ba092ca4d24d00fa1d82c01e1401c",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}