{
  "manageEntity": {
    "action": "Save",
    "entityId": "504231882",
    "entityType": "Track",
    "nonce": "0x0235935c09b5da297b02a39b16b59b708fe9c478e0edc13efc66e3b04cf740ac",
    "signature": "0xe2f7923158fc017fa7ca5e227a9e685a119dea6fc5a817c9f92f728f607e37590b4e0cf9e95255ce2593fb0e16855cbd24ee78f36be90b51ff7e496bee7248e31b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}