{
  "manageEntity": {
    "action": "Save",
    "entityId": "1415339932",
    "entityType": "Track",
    "nonce": "1789403003670061695",
    "signature": "0xe362a28d52aefbdcce0ee3d22bf3de4d3c177e72e5ee8b113434a1ba36ecf6a1008ab209fa91be133ea35fd6689bc856595af595f2f6cb1ecea8d8823d39d7c91c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}