{
  "manageEntity": {
    "action": "Save",
    "entityId": "486408570",
    "entityType": "Track",
    "nonce": "0x215875e8c448c0bdce1941a38a1868fbe9ce63bb36266faf996aae4c033b4250",
    "signature": "0x64ab31591d0fb901407bba03b4d1615cdae3c5e24652263f526d2eb65251e7ca78bb720562e9b7973d1ad7f1803195797d29ef20491f3f1915077edd01e1aeb81b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}