{
  "manageEntity": {
    "action": "Save",
    "entityId": "1492942755",
    "entityType": "Track",
    "nonce": "0x26adc887fe660eee0e44f61ac43d1d9e3fe992565c8b9fed0536791f3288b4a9",
    "signature": "0x3b9d9a8cd77229352158c4777f3ae418ffaac2ebe3e4a7838e2d6462e143e403407711ab80fe2cb5f858f4ba14f955230594bbba96a0841cd3b65aee0d26bc081b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}