{
  "manageEntity": {
    "action": "Save",
    "entityId": "1040534080",
    "entityType": "Track",
    "nonce": "0xe8dc3c37f24a239074aba6e5118c846b4c50fd8c2db3ed7feba2f93924cd2081",
    "signature": "0x291b3fb7275b04cee3a1a012cce87c345c01d47abb0f28a08f9b7565186611fa582186b3f1aa8a61490dfe54e3e51e4691d0bb22d845a09097ba70b8e95b55db1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}