{
  "manageEntity": {
    "action": "Save",
    "entityId": "1311578921",
    "entityType": "Track",
    "nonce": "0x89a2a21189d31fb8a4ab5097b9f46a48c85608e49e8fc13d9c75509a2dd8994b",
    "signature": "0x40ca97c79d91c942e61c0edaf10a59432503513c7f31b652f24feef23995952778148e6e7606784820bac650beca0083b612adb884038fe8e6dff731b3508c7b1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}