{
  "manageEntity": {
    "action": "Save",
    "entityId": "670546",
    "entityType": "Track",
    "nonce": "0xd4010b3281e8f25b2dee147ccedb9671ce4acfd1799a04b25ce24192dbaca7b2",
    "signature": "0x4cfa568ee18b4dd7434ae9f6af9fe989ebd18c57baada87638254b62e063c1845251d809fecf149b604425820a19f09ada7a870348a887313502fcef690c350b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}