{
  "manageEntity": {
    "action": "Save",
    "entityId": "151092651",
    "entityType": "Track",
    "nonce": "0xb21b4ac0ed6944b3a48ce60ab369fe63997620296526564dac7288875178503c",
    "signature": "0x5210c6aed2e22eedebd1de026836364612c532653bb1c0c7181a9c5fc2f0620d0d4dbea1431fadc979bc9609d27da78f76042191bedef89f763722302822cd5a1c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}