{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458078217",
    "entityType": "Track",
    "nonce": "0x7fd83ddd1e02b7bd0fd6c8fbb95fdedb8721b2879c14fbce5a6c72c78ae1dd18",
    "signature": "0x4b2d50d5a81ae20703eb399a05bea8fb225a36eae214e300e49c611606d60f5f56639f8c08df3cab35390d0fbdfec139d76fbfbbf539851261e581b523a3645f1c",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}