{
  "manageEntity": {
    "action": "Save",
    "entityId": "622878392",
    "entityType": "Track",
    "nonce": "0xe448b12b35cc062ca7c7a4406e1933c35774cbf796a484e694386f906c471b8e",
    "signature": "0x4614a9ecec567c7e8b6cd19d11b16b17cd455d88ea63ca581bbb216710aa93ed5cab867666c099e7134e02e32b7115049f6a2a3a2d9c2daf4057d6114b2149ac1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}