{
  "manageEntity": {
    "action": "Save",
    "entityId": "1153749626",
    "entityType": "Track",
    "nonce": "0xae3b49f4dcc57588f6c233336ae807f054ed1cc0f0d989fe16dc3eb75241364e",
    "signature": "0xc8b73dfe0e63b09cf0be483e46092a2c2a502ec9480327b39531e5d50df9351e56797ddaa70f1f7e606c0ffe027bcee11071fcaab5bd653a52fc808fa38f842d1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}