{
  "manageEntity": {
    "action": "Save",
    "entityId": "910009298",
    "entityType": "Track",
    "nonce": "0x8d1a2097d1d5267889de4a9c0c299da15cebdffe1bc81224349a9d4b216cacd9",
    "signature": "0x997c860a7f7c5aa77bdf02e5030d13fe3beea25e1889d002b73229e5aa8ba368210cfa776bfe3b4ac190782898b734db4e700f3447a4be145aa4863b535df92b1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}