{
  "manageEntity": {
    "action": "Save",
    "entityId": "1238091343",
    "entityType": "Track",
    "nonce": "0x828e9c096eab93fc39afd50bb40f31a98382a106fabe72d56a8bc68311664365",
    "signature": "0xae4500c0e52b082fbc0eb8bbc984d819d6d2ae7d2608616e317cbf067f9983180c745ce096ba16126e27911d67899eca798c9adfee8c24d1a70d2b378e179e7d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}