{
  "manageEntity": {
    "action": "Save",
    "entityId": "1688428847",
    "entityType": "Track",
    "nonce": "0x5486a35ea5896bc9bbbc22e4b5e957d01df89a7b4a9484fb80c690338c39fe04",
    "signature": "0x644ffdf96b1a8b19f85c01966934e31066a9754de2629ce0879105377d2f84b50098fd385e45c29943912b8e915769d74906dd08baee0526fe4d760e3981c9501c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}