{
  "manageEntity": {
    "action": "Save",
    "entityId": "542486665",
    "entityType": "Track",
    "nonce": "0x8bbd6a97d137b667c8cf9e06947b9a3f2d70401b85545acc7900ab256c02c882",
    "signature": "0x035c6fc2de90d06422cca70b79c231e52ac39c402226ba6c9d8485636db716965f918ec9fe3f08059fc018ab0bc84a443987511f1eedf6c68b165c031b83063b1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}