{
  "manageEntity": {
    "action": "Save",
    "entityId": "156695",
    "entityType": "Track",
    "nonce": "0x10cca1f7c6c7dfaa37844e5662a8dcb55e12c281d672d09b218711a7307043d5",
    "signature": "0x787f91cff849f862c8a9ea2272198e05af71ef90c20a1631d05fded1b8377d7c497d634d8113bc12cca3785b255c1acc87204407b00714d9ba0724e8c1d328be1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}