{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984821525",
    "entityType": "Track",
    "nonce": "0x335d2aca4e4478612cdfd3b370aebe745ae36caee7dc4a81b529b210136bf9ca",
    "signature": "0xfe67c460507d2af69899349b36daaf7fe3c17365316739e1648b292dbb85b9a440037ea1530089722d1f9fc58a041e5fbb4df0650e4bea04a7b6cab9c85bb7cf1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}